What is meant by lateral displacement?

lateral displacement is the mechanism in which light changes its path when it travells from one medium to the another.

if the second medium is thicker/denser from the first one then the light moves towards the normal and if the second medium is lighter/rarer than the first medium then the light ray move away from normal.

  • 96

 it is quite difficult to learn the last phenomena. so remember it like this.

if you throw a ball slantly in water then it moves towards normal and if the ball will be thrown slantly out of the water then it will move away from the normal.

always remember that this law of lateral displacement occurs due to speed of light in different mediums.

means speed is the important factor in it.

hope it helps!

  • 18

lateral displacement also known as lateral shift is the change or deviation of light from its original path when passing tfrom a rarer to a denser medium (moves towards the normal)the distance between the deviated ray and the original ray is called lateral displacement or lateral shift.

  • -3

Refraction occurs when the speed changes when the lights travels from one medium to another medium. If the light travels from a medium to a denser medium, the light slows down and consequently is refracted towards the normal.thus the distance by which the light has been displaced after its binding thru a glass slab is known as lateral displacement.

Lateral displacement depends upon-

  • thickness of glass slab
  • angle of incidence
  • refractive index of glass slab
  1. Lateral displacement is directly proportional to the  above three factors.
  2. It is inversely proportional to the wavelength of incident light.
  3. hope this helps you.......thumbs up!!

  • 12

Refraction occurs when the speed changes when the lights travels from one medium to another medium. If the light travels from a medium to a denser medium, the light slows down and consequently is refracted towards the normal.thus the distance by which the light has been displaced after its binding thru a glass slab is known as lateral displacement.

Lateral displacement depends upon-

  • thickness of glass slab
  • angle of incidence
  • refractive index of glass slab
  1. Lateral displacement is directly proportional to the  above three factors.
  2. It is inversely proportional to the wavelength of incident light.
  3. hope this helps you.......thumbs up!!

  • 70
Refraction occurs when the speed changes when the lights travels from one medium to another medium. If the light travels from a medium to a denser medium, the light slows down and consequently is refracted towards the normal.thus the distance by which the light has been displaced after its binding thru a glass slab is known as lateral displacement If the light travels from one medium to a less dense medium, the speed increases and as a result, the light is refracted away from the normal. according to Snell's law.....refractive index is the ratio of sine of angle of incidence to the sine of angle of refraction.
  • -12
WHEN A BEAM OF LIGHT PASSES THROUGH A GLASS SLAB .......
IT IS SEEN THAT THE PATH OF EMERGENT RAY IS SLIGHTLY DISPLACED FROM THE PATH OF INCIDENT RAY ..........
AND THE PERPENDICULAR DISTANCE THE PATH OF EMERGENT AND INCIDENT RAY IS SAID YO BE LATERAL DISPLACEMENT......!!!
  • -5
the perpendicular distance between the  emergent ray  and incident ray  when light passed through the glass slab after refraction.
  • 37
The perpendicular distance b/w the emergent ray and extended the incident ray is known as lateral displacement. After a ray of light enters a denser medium from a rarer medium it refracts and when that refracted ray enters that rarer medium again it refracts again. The later refracted ray is emergent ray which is parallel to the extended incident ray. This is the best answer !!!!
  • -11
Lateral displacement or lateral.shift is basically the shift or the measurement of the original path of light and the refracted ray of light.
  • -2
lateral displacement is a prependicular distance b.w the emergent ray and the original incident ray.
  • -9
The prependicular distance between the incidebt ray and emergent ray coming out through a glass slab is called lateral displacenent.
  • -16
the distance by which the light has been displaced after its binding thru a glass slab is known as?lateral displacement.
  • -3
tysm...
  • -12
The shortest distance between the 2 parallel rays is called lateral displacement
  • -12
Distance between the incident rsy extende snd emergent/transmitted ray.
  • -11
The perpendicular shift in the path of the incident ray and the emergent ray is lateral displacement I think you got the answer so please get lost dakh le sale
  • -15
The prependicular distance between the incidebt ray and emergent ray coming out through a glass slab is called lateral displacenent.
  • -7
lateral displacement is the mechanism in which light changes its path when it travells from one medium to the another.

if the second medium is thicker/denser from the first one then the light moves towards the normal and if the second medium is lighter/rarer than the first medium then the light ray move away from normal.
  • -7
Laterial displacement is a perpendicular disrance between the emergent ray and incident ray then the light passes out of glass slab .

  • -10
The perpendicular distance b/w the incident ray & emergent ray

  • 5
It's convex mirror because it has negative focal length but it does not have positive so it does not be concave mirror
  • -6
Please answer these questions:- 1.
  • -6
Derive f=r/2
  • -2
The pependicular distance between the emergent ray and incidents ray
  • 16
The distance between the original ray and emeragent ray is called lateral dicplacement

  • -7
lateral displacement is the perpendicular distance between the emergent ray and and the original path of the incident ray. it should be noted that both the rays are parallel to each other in this condition. 
  • 44
Refraction occurs when the speed changes when the lights travels from one medium to another medium. If the light travels from a medium to a denser medium, the light slows down and consequently is refracted towards the normal.thus the distance by which the light has been displaced after its binding thru a glass slab is known as lateral displacement. Lateral displacement depends upon- thickness of glass slab angle of incidence refractive index of glass slab Lateral displacement is directly proportional to the above three factors. It is inversely proportional to the wavelength of incident light.
  • -13
It usually appears INVERTED (depends on the type of mirror e.g convex, concave) It can be OBTAINED ON A SCREEN In case of mirror, the image lies in front of the reflecting surface. In case of lens, the image lies on the other side of the object. The light rays meet at a focal point in front of the mirror VIRTUAL- It usually appears ERECT It CANNOT be obtained on a screen In case of a mirror, the image lies behind the mirror In case of lens, the image lies on the same side of the object The light rays meet at a focal point behind the mirror Basically, REAL- Images that are real, and can be captured on the screen. Light rays meet after refraction. VIRTUAL-Images that aren't real, and can't be captured on screen. Light rays do not meet after refraction
  • -2
When a ray of light is incident obliquely on a parallel sided glass slab the emergent ray shifts laterally. The perpendicular distance between the direction of the incident ray and emergent ray is called lateral displacement.
Hope this answer was helpful.
  • -5
The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium.
  • -2
Nice pic
  • -5
This is a site to ask questions Not to upload pics 👿👿
  • -5
Hey guys can i get a short application of T.I.R: 1)Mirage 2)brilliance of diamonds 3)optical fibre
  • -3
Srry i am basically in class 12th not 8th
  • -5
Refractive index is defined as the ratio of speed of light in vaccum/air to the speed of light in a specified medium.

  • 2
How many band is are there
  • -6
Relative Refractive Index The ratio of speeds of light in a given pair of media gives us a measure of the extent of refraction (or bending) of a ray of light as it goes from one medium to another. We use this ratio to define a term called the relative refractive index for a given pair of media. Hope u all find this answer useful.(:p) :)
  • -2
Lateral displacement is the right side of the object appears left side of the imageor the left side of the object appears right side of the image
  • -2
the distance between emergent ray and actual appear of incident ray .
  • -2
The perpendicular distance from incident ray and emergent ray coming out of the glass slab is called lateral displacement

  • -2
The distance between the incident ray and the emergent Ray is known as lateral displacement.

hope it helps:)
  • -1
the distance between the emergent ray and the actual incident ray is known as lateral displacement.
  • 5
The solid red line is the emergent ray. It bends due to refraction. ... Our eyes cannot perceive the bending of light and assumes that light travels in a straight line so the position of the object appears to be shifted. This is called lateral displacement or shift
  • -4
Lateral displacement is a phenomenon seen when light travel through one medium to another. It is perpendicular distance between incident ray and emergent ray....
  • 0
Lateral Displacement

The?perpendicular distance?between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium.
  • -3
Lateral Displacement. The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium
  • 0
In simple words, lateral displacement is the perpendicular distance between the incident ray and the emergent ray.
  • 9
displacement between incident ray and emergent ray.and this depend upon the angle of incidence,angle of refraction and the thickness of medium
 
  • 0
Hello friend!!
Rajdeep here....

Whenever a light ray refracts in a glass slab, the emergent ray emerges out from the glass slab parallel to the incident ray. There is a distance between the actual emergent ray and the enlarged incident ray. This distance is knows aslateral displacement.

Thus, lateral displacement is the perpendicular distance between the actual emergent ray and the extended incident ray when a light ray suffers refraction from a glass slab.

Thanks!!
  • -3
"Lateral displacement.The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift.This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium." 
  • 3
lateral displacement is the slight shift of the emergent ray from the the path of incident ray
  • -5
poker face for that picture :|
  • -2
Lateral displacement is a phenomenon in which light changes its path when moves from one medium to another..
  • -4
Lateral displacement: The perpendicular distance between the emergent ray and incident ray when the light passes out of a glass slab is called lateral displacement
  • -1
The perpendicular distance between the incident ray and the emergent ray is defined as lateral displacement.
  • 1
Lateral displacement is the perpendicular distance between the incident ray and the emergent ray.Below,the perpendicular distance between incident ray and emergent ray at the bottom of the glass lab is line AB.Hence,AB is the lateral displacement.

  • 5
hsljksA
  • -2
Please find this answer

  • -4
Yo study app s ura tere buva ki sadi na hari
  • -3
Photo upload kara
  • -5
Nice doato
  • -3
Perpendicular distance
  • -2
the shifting of light ray sideways on emergence from a rectangular glass slab is called lateral displacememt.
  • -1
When the light travels from one medium to another. The light ray either bend toward the normal or away from it means it changes its path.It is known as lateral displacement
  • 2
The distance between emergent ray and extended incident ray
  • -2
The distance between the emergent ray and extended incidence ray after refraction through parrallel sided glass slab
  • -1
"Lateral displacement.The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift.This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium."?
  • -1
The distance between the emergent ray and the invident ray(on being extended) is lateral displacement . It is called so as it is latersl (straight) and aas being oarallel only little displacement has occurred.
  • 0
Lateral displacement is the phenomenon seen when light travels through one medium to another . It is perpendicular distance between incident ray and emergent ray
  • 1
When an object is place infront of a plane mirror the right side of the object seems to be the left side of the image and vice versa,this phenomenon is called lateral displacement.
  • -1
the perpendicular distance between the incident ray and emergent ray coming out through a glass slab is called lateral displacement..the ray bends to normal when it travels from rarerer to higher medium medium, the ray goes in the opposite to the direction of normal whe travels from higher to rarer medium.
 
  • -2
THE PERPENDICULAR SHIFT IN THE PATH OF INCIDENT LIGHT WHILE EMERGING OUT FROM OPTICAL GLASS SLAP IT IS KNOWN AS LATERAL DISPLACEMENT.
  • -1
the perpendicular shift in the path of incident ray as it emerges out from denser medium is called as lateral displacement 
  • -1
given
  • 2
The perpendicular distance between the emergent ray and the incident ray when the light passes out of a glass slab is called lateral displacement.
  • 1
The perpendicular distance of separation between the emergent ray and the incident ray is called lateral displacement. It is seen that the emergent ray of light is parallel to the incident ray but displaced from the path of the incident ray after refraction through a glass slab.
  • 0
The perpedicular distance between the extended incident ray and the emergent ray is called lateral displacement.
  • 0
hi how are you
  • 1
ok
ok
  • 0
i just need points
  • 0
Changing of bath of beam of light
  • 0
Sorry yar; I don't know it... Sorry for this.......
  • -1
In plane mirror left side appears as right and viceversa
  • 0
the perpendicular distance between emergent ray and incident ray when the light passes out of a glass slab is called lateral displacement
  • 1
Here's ur answer..... The perpendicular distance between the emergent ray and the refracted ray, when the light rays pass out of a glass slab is called the lateral displacement. ...hope it helps..!😄
  • 0
Lateral displacement means when we see our left hand, it appears right hand and vice versa. The appearing of right to left and left to right is known as lateral displacement
  • 0
What is the work to be done to increase the velocity of car from 5m/s to 10m/s if the mass of car is 800kg
  • 0
Lateral Displacement. The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium.
  • 0
When a ray of light travels through a denser medium, it gets literally displaced, i.e. ,the ray’s position changes but it’s direction remains the same. A light ray travelling from a rarer medium to a denser medium bends towards the normal. A ray travelling from a denser medium to a rarer medium bends away from the normal. This causes lateral displacement.
  • 0
Yours answer

  • 0

Lateral Displacement. The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium.

 

  • 0
Please find this answer

  • 0
The perpendicular distance between the original path of incident ray and emergent ray coming out of glass slab is called as Lateral Displacement.
  • 0
Lateral displacement is the distance between the emergent ray and the direction of the original ray

  • 0
Lateral Displacement is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced forward.
  • 0
The displacement between the emergent ray and original path of the incident ray is known as lateral displacement
  • 0
The perpendicular distance between the incident ray and emergent ray is called lateral displacement.
  • 0
under what condition in an arrangement of two plane mirrors incident ray and reflected ray will always be parallel to each other whatever maybe angles incident show the same with the help of diagram class 10th science chapter light
  • 0
The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift .This shift depends upon the angle of incidence and the angle of refraction and the thickness of the medium.
  • 0
the perpendicular distance between the path of emergent ray and direction of the incident ray is called the lateral displacement
  • 0
The perpendicular distance between incident ray and the emergent ray is called the lateral displacement.
  • 0
The perpendicular distance between the emergent ray and the direction of incident ray .
  • 0
The perpendicular distance between the path of emergent ray and the direction of incident ray is known as lateral diaplacement
  • 0
Dear student, Lateral displacement is the interchange of left and right sides in the image of an object in a plane mirror.

  • 0
examples of real and virtual images
  • 0
The amount of displacement of the incident ray from its original oath is called lateral displacement.
Hope it helps!
  • 0
Displacement in retracted rat and emergent ray
  • 0
It is the prependicular distance between the emergent ray and the incident ray produced
  • 0
Lateral Displacement?is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced forward.
  • 1
Sorry i dont know this
  • -1
Definition Of Lateral Displacement: The Perpendicular Distance Between The Incident Ray and the Emergent Ray.
  • 0
Please find this answer

  • 0
The parallel shiftment of ray of light when it passes through glass slab due to refraction is called lateral displacement.
  • 0
The perpendicular distance between the incident ray extended and the emergent ray is called lateral displacement in a glass slab experiment
  • 0
Jijo
  • 0
The perpendicular distance between the path of the emergent ray and the direction of the incident ray is known as lateral displacement
  • 0
Lateral displacement?is perpendicular distance between incident and emergent ray when light ray get through refraction from glass slab.

  • 0
The perpendicular distance between the original path of incident ray and emegency ray coming out of glass slab is called as lateral displacment.
  • 0
The perpendicular distance between emergent ray amd incident ray when it passes out of the glass glab is called lateral displacement.
  • 0
Lateral displacement. The perpendicular distance between the incident ray and the emergent ray is?defined?as?lateral?shift. This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium.
  • 0
Please find this answer

  • 0
The perpendicular distance between the incident ray and the emergent ray is?defined as?lateral?shift or displacement.
  • 0
The perpendicular distance between the original path of incident ray and the emergent ray is called lateral displacement or shift
  • 0
object at C of concave mirror

  • 0
It is a perpendicular shift towards the incident ray from one region to another.
  • 0
Shift in position of ray of light before and after refraction is known as L.S
  • 0
Hope this helps you

  • 0
When a light ray enters from a rarer to denser medium, refraction takes place. Due to refraction the light ray bends towards the normal which otherwise would have travelled in a straight line. The light ray has been displaced right, this is known as lateral displacement
  • 0
"Lateral displacement. The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift. This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium.
  • 0
Please find this answer

  • 0
Please find this answer

  • 0
What is the stacture of atom
  • 0
Lateral Displacement is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced forward.
  • 0
The perpendicular distance between the incident ray and emergent ray is defined as lateral shift. This shift depends upon the angle of incidence, the angle of refraction and the thickness of the medium.
  • 0
when the object is placed in front of a plane mirror then the right side of the object appears to become the left side of the image on the left side of the object appears to become the right side of the image these changes sides of an object and its Mirror image is known as lateral inversion lateral displacement this phenomenon of lateral inversion is due to the reflection of light.
  • 0
In a glass slab when refraction occurs , the emergent ray is parallel to the extended incident ray . This parallel distance between the incident ray and emergent ray is called lateral displacement.
  • 0
What is velocity??
  • 0
Lateral Displacement means the perpendicular distance between the incident ray and the emergent ray is defined as lateral sift
  • 0
the perpendicular distance between the incident ray and the emergent ray is known as lateral displacement.
  • 0
Lateral displement =thickness*sin(angle of incident-angle of recreation/cose r
  • 0
Dear friend, do you have some time if you have then please give me 5s go to my profile and like & upvote my video as I had made it by doing very hard work
  • 0
Perpendicular distance between incident ray and emergent ray
  • 0
Lateral displacement is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced foreword
  • 0
The distance between the path of emergent ray and the direction of incident ray is called lateral Displacement
  • 0
When the perpendicular distance between the original path traced by an incident ray coming out from the glass slab is known as lateral displacement.
  • 0
What Is?Lateral Displacement? When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as?lateral displacement. ... The angle at which incident ray enters the glass slab
  • 0
Lateral displacement is the displacement occurred in the glass slab due to change in lights speed which had changed its path but is always parallel to the incidence ray
  • 0
Do you like me ?
  • 1
I don't kwin the answer
  • 0
Please find this answer

  • 0
The perpendicular shifts in the path of incident ray, while emerging out of a rectangular optical slab is called lateral displacement
  • -1
Take a full of mug water to put a stone same is displacement
  • 0
The perpendicular distance between the emergent ray and the original path of incident ray is called as Lateral displacement.
  • -1
the perpendicular separation of the perpendicular distance between the extended path of the incident ray and emergent Ray is known as lateral displacement
  • -1
This is your answer.

  • -1
Please find this answer

  • -1
when the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement
  • -1
When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement
  • -1
Please find this answer

  • -1
"Lateral displacement.The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift.This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium."
  • -1
The perpendicular shift in the part of incident ray, while emerging out of a rectangular optical slab is called lateral displacement
  • -1
khanij kya hai Hindi mein jawab dijiye
  • -1
Hiii
  • -1
The prependicular distance between the incidebt ray and emergent ray coming out through a glass slab is called lateral displacenent.
 
  • -1
angular velocity?refers to how fast an object rotates or revolves relative to another point, i.e. how fast the?angular?position or orientation of an object changes with time. There are two types of?angular velocity: orbital?angular velocity?and spin?angular velocity
  • -1
the difference between concave and convex lens is their physical appearance. The convex thin at the edges and thick at the center's while the concave lens is thin at the centre and thick at the ages.T he curvatures of the convex lens is outward facing , whereas the curvatures of the concave lens is inward facing.
  • -1
the perpendicular distance between the original path traced by the incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement
  • -1
perpendicular distance between the original path is traced by the incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement
  • -1
Lateral displacement is the distance between the incident ray on extending to the end of the glass slab and the emergent ray.
Like this??

  • -1
Dear student,When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as?lateral displacement.
  • -1
When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as?lateral displacement.
  • -1
When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement. ... The angle at which incident ray enters the glass slab
  • 1
When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement.
  • 0
Please find this answer

  • 0
The perpendicular distance between the original path of the incident ray and the emergent ray is known as Lateral Shift or Lateral Displacement.
  • 0
The perpendicular distance between original path of incident ray and the emergent ray .
  • 1
The perpendicular distance orginal path between incident ray and emergent ray is called lateral displacement
  • 1
lateral displacement is the perpendicular distance between the emergent ray and and the original path of the incident ray. it should be noted that both the rays are parallel?to each other in this condition.??
  • 0
when when we place an object on the principal axis of a concave mirror at a point between focus if and centre of curvature C the image is formed beyond the centre of curvature
  • 0
Lateral displacement.The perpendicular distance between the incident ray and the emergent ray is defined as lateral shift.This shift depends upon the angle of incidence,the angle of refraction and the thickness of the medium."
  • 0
I don't no
  • 0
Having collapsed right and left direction in mirror
  • 0
When the perpendicular distance between the original path traced by an incident ray and the path traced by emergent ray coming out from the glass slab is known as lateral displacement
  • 0
What is the elan mark of 20-30
  • 0
Aijaz
  • 0
perpendicular distance between the original path of the incident ray and emergent Ray coming out of the glass slab
  • 0
The perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement.
Following are the factors on which lateral displacement depends:

The thickness of the glass slab

Refractive index of the glass slab

The angle at which incident ray enters the glass slab.
  • 0
I don't know
  • 0
When a light ray passes through a glass slab, then the incident ray produced is parallel to the emergent ray, but it is parallelelly shifted from it. The perpendicular distance between the incident ray produced and emergent ray is known as lateral displacement.
  • 1
lateral displacement is the distance between refracted ray and actual position of incident ray which passes straight through the medium.

Is this correct or wrong ?...
  • 0
Ghat
  • 0
Ray parallel to the incident ray is called as lateral displacement /emergent ray/lateral shift.
  • 0
When the perpendicular distance between the original path traced by an incident ray and the path traced by emergent ray coming out from glass slab is known as lateral displacement
  • 0
  The perpendicular distance between the emergent ray and the reflected ray is known as lateral displacement.
  • 0
Please find this answer

  • 0
lateral displacement is the perpendicular distance between the emergent ray from the glass slab and the incident ray produce forward
  • 0
Lateral Displacement is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced forward
  • 0
When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement.
  • 0
The difference of real depth and apparent depth is called lateral displacement
  • 0
lateral displacement is the perpendicular distance between the incident ray and emergent ray
  • 0
Please find this answer

  • 0
Answer: hodgkin was the gardener of mrs pumphrey. he had fallen ill
  • 0
Tricki was treated by Dr Herriot without medicine or surgery. He controlled the amount of food he ate and gave him plenty of water. He made Tricki play and exrecise with the other dogs in the surgery. Tricki
  • 0
eshwarshop light
  • 0
The perpendicular distance between original incident Ray and emergent Ray is called lateral displacement.
  • 0
It is a type of mechanism in which light gets displaced when it enters from one medium to another medium.
  • 0
What are you looking for?