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DERIVATION OF MIRROR FORMULA.
an empty spherical flask of diameter 100 cm is placed in water (n=4/3). a parallel beam of light strikes the flask.where will it apper to come from to an observer within the flask
suggest me a working model project in physics
what is the meaning of scattering of light?
difference between extrinsic and intrinsic semiconductor
Derive an expression for the focal length of the combination of two thin lenses when they are SEPERATED by a small distance?
An equilateral prism of glass of refractive index of 1.45 is immersed in water of refractive index 1.33. A narrow beam of light falls normally on one face of the prism. find the angle of emergence of the beam??
cbse XII physics investigatory project-
3.To find the refractive indices of (a)water (b) oil (transparent) using a plane mirror , a equiconvex lens and an adjustable object needle.
how does focal length of a lens depends on the wavelength of light passed through?according to me the focal length should not change as focal length is a physical quantity of a lens so it should not change.
For the same value of angle of incidence the angle of refraction in three media A,Band C are 15 degree,25 degree and 35 degree respectively.in which medium the velocity of light be minimum?
derive F=R/2 for convex mirror
Why the uv graph of concave mirror is parobilic and1/u and1/v graph is a linear graph???
derive lens maker formula by concave lens
A convex lens of focal length 20cm is placed coaxially with a convex mirror of radius of curvature 20cm. The two are kept 15 cm apart. A point object is placed 40cm in front of the convex lens.Find the position of the image formed by the combination .
please answer!!
Diameter of a plano - convex lens is 6 cm and thickness at the centre is 3mm. If speed of light in material of
prove that light waves are transverse in nature
how can we identify convex and concave lens without touching them?
Explain Mirage formation?
practical reading of determination of refractive index of a glass slab using a travelling microscope
v versus u graph for convex and concave mirror
what is the formula for finding lateral displacement?
a double convex lens made of glass of refractive index 1.5 has its both surfaces of equal radii of curvature of 20 cm each an object of 5 height is placed at a distance of 10 cm from the lens .find the position ,nature and size of the image
a ray of light making an angle 10 degree with the horizontal is incident on aplane mirror making an angle theta with the horizontal ,what should be the value of theta so that the reflected ray goes vertically upwards?
Derive a relation between the focal length and radius of curvature of a Plano convex lens made of
A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12 cm from P. At what point does the beam converge if the lens is (a) a convex lens of focal length 20 cm, and (b) a concave lens of focal length 16 cm?
What is concave mirror used as shaving mirror?
What angle of incidence should a beam of light strike the
calculate speed of light in a medium whose critical angle is 30 degree.
Three rays of light red(R) ,green(G) and blue(B) are incident on the surface of a right angled prism normally on its perpendicular.The refractive indices for the material of tha prism for red,green and blue are 1.39,1.43,1.47 respectively.Trace the path of the rays through the prism.How will the situation change if the rays were falling normally on one of the faces of an equilateral prism?
draw a labelled ray diagram to show the formation of image in an astronomical telescope in the normal adjustment position and write the expression for its magnifying power.
What is the difference between crown glass and flint glass?
draw a plot showing the variation of power of a lens with the wavelength of incident light.
A lens behaves as a converging lens in air and a diverging lens in water (u = 4/3). What will be the condition on the value of refractive index (u) of the material of the lens ?
a ray of light passes through an equilateral glass prism such that angle of incidence is equal to the angle of emergence.if the angle of emergence is 3/4 times angle of prism.calculate the refractive index of prism.
the refracting angle of a glass prism of refractive index 1.45 is 60 degrees. At what angle should a light ray be incident at the first face of the at prism so that it emerges at the second face just parallel to the face??
if a covex lens is cut horizontally from the middle what will happen to its focal length?also consider the case of a concave lens.
you are given following three lenses. which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?L power aperture
L1 3D 8cm
L2 6D 1cmL3 10D 1cm
draw a labelled ray diagram of compound microscope and explain its working.
plzz explain the construction and working og a compound microscope.... plzz
Use the mirror equation to deduce that:
(a) an object placed between f and 2f of a concave mirror produces a real image beyond 2f.
(b) a convex mirror always produces a virtual image independent of the location of the object.
(c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole.
(d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.
[Note: This exercise helps you deduce algebraically properties of
images that one obtains from explicit ray diagrams.]
state and explain faraday's laws of electromagnetic induction. deduce an expressionfor the induced emf in a coilrotating uniformly in a uniform magnetic field.
a ray of light is incident on a plane mirror along the direction given by vector A= 2i-3j+4k. find the unit vector along the reflected ray. (Take normal to the mirror along the direction of vector B= 3i-6j+2k)
An air bubble in a glass slab of refractive index 1.5 is 6cm eep as viewed from one face and 4cm deeo as viewed from the nother face. What is the thickness of the glass slab?
how does the focal length of a convex lens change if monochromatic red light is used instead of monochromatic blue light?
how to draw Compound Microscope ray diagram step wise?how to draw Compound Microscope ray diagram step wise?
Does critical angle depend on color of light? Explain.
draw a labelled ray diagram to show the image formatin in a refracting type astonimical telescope.
What are Advantages of reflecting telescope over refracting telescope?
An object is placed at a distance of 15 cm from the convex lens of focal length 10 cm . on the other side of the lens , a convex mirror is placed such that its distance from the lens equals the focal length of the lens. The image formed by this combination is observed to coincide with the object itself. find the focal length of convex mirror..
A convex lens is placed in contact with the plane mirror. A point object at a distance of 20 cm on the axis of this combination has its image coinciding with itself. What is the focal length of the lens?
Figure shows an equiconvex lens (of refractive index 1.50) in contact with a liquid layer on top of a plane mirror. A small needle with its tip on the principal axis is moved along the axis until its inverted image is found at the position of the needle. The distance of the needle from the lens is measured to be 45.0 cm. The liquid is removed and the experiment is repeated. The new distance is measured to be 30.0 cm. What is the refractive index of the liquid?.....
(a) A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification of the telescope?
(b) If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.48 × 106 m, and the radius of lunar orbit is 3.8 × 108 m.
Whats First and second principal focal length?
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Syllabus
DERIVATION OF MIRROR FORMULA.
an empty spherical flask of diameter 100 cm is placed in water (n=4/3). a parallel beam of light strikes the flask.where will it apper to come from to an observer within the flask
suggest me a working model project in physics
what is the meaning of scattering of light?
difference between extrinsic and intrinsic semiconductor
Derive an expression for the focal length of the combination of two thin lenses when they are SEPERATED by a small distance?
An equilateral prism of glass of refractive index of 1.45 is immersed in water of refractive index 1.33. A narrow beam of light falls normally on one face of the prism. find the angle of emergence of the beam??
cbse XII physics investigatory project-
3.To find the refractive indices of (a)water (b) oil (transparent) using a plane mirror , a equiconvex lens and an adjustable object needle.
how does focal length of a lens depends on the wavelength of light passed through?according to me the focal length should not change as focal length is a physical quantity of a lens so it should not change.
For the same value of angle of incidence the angle of refraction in three media A,Band C are 15 degree,25 degree and 35 degree respectively.in which medium the velocity of light be minimum?
derive F=R/2 for convex mirror
Why the uv graph of concave mirror is parobilic and1/u and1/v graph is a linear graph???
(1) 5, 10, 15 (2) 5, 15, 30 (3) 5, 25, 35 (4) 5, 15, 25
derive lens maker formula by concave lens
A convex lens of focal length 20cm is placed coaxially with a convex mirror of radius of curvature 20cm. The two are kept 15 cm apart. A point object is placed 40cm in front of the convex lens.Find the position of the image formed by the combination .
please answer!!
Diameter of a plano - convex lens is 6 cm and thickness at the centre is 3mm. If speed of light in material of
(A) 10.0 m (B) 4.0 m (C) 6.0 m (D) 8.0 m
1- deviate the ray through 180 degree
2- deviate the ray through 90 degree
3- invert the ray ..
prove that light waves are transverse in nature
(1) 0
(2) 90
(3) 180
(4) 270
how can we identify convex and concave lens without touching them?
(1) 3 cm (2) 4 cm (3) cm (4) 6 cm
Explain Mirage formation?
practical reading of determination of refractive index of a glass slab using a travelling microscope
v versus u graph for convex and concave mirror
1.5/3
2.5/4
3.16/15
4.1.5
what is the formula for finding lateral displacement?
plz ans fast !
a double convex lens made of glass of refractive index 1.5 has its both surfaces of equal radii of curvature of 20 cm each an object of 5 height is placed at a distance of 10 cm from the lens .find the position ,nature and size of the image
a ray of light making an angle 10 degree with the horizontal is incident on aplane mirror making an angle theta with the horizontal ,what should be the value of theta so that the reflected ray goes vertically upwards?
Derive a relation between the focal length and radius of curvature of a Plano convex lens made of
A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12 cm from P. At what point does the beam converge if the lens is (a) a convex lens of focal length 20 cm, and (b) a concave lens of focal length 16 cm?
What is concave mirror used as shaving mirror?
What angle of incidence should a beam of light strike the
calculate speed of light in a medium whose critical angle is 30 degree.
Three rays of light red(R) ,green(G) and blue(B) are incident on the surface of a right angled prism normally on its perpendicular.The refractive indices for the material of tha prism for red,green and blue are 1.39,1.43,1.47 respectively.Trace the path of the rays through the prism.How will the situation change if the rays were falling normally on one of the faces of an equilateral prism?
1. convex of focal length 70 cm
2. concave of focal length 70 cm
3. concave of focal length 66.6 cm
4. covex of focal length 66.6 cm
5.concave of focal length 72.5 cm
draw a labelled ray diagram to show the formation of image in an astronomical telescope in the normal adjustment position and write the expression for its magnifying power.
Q.3. A biconvex lens ( = 1.5) of focal length 0.2 m acts as a divergent lens of power 1 D when immersed in liquid. Find the refractive index of the liquid.
(1) 2 sin A
(2) 2 cos A
(3)
(4) tan A
What is the difference between crown glass and flint glass?
1. 6 towards the mirror
2. 6 away from the mirror
3. 9 towards the mirror
4. 9 away from the mirror
draw a plot showing the variation of power of a lens with the wavelength of incident light.
A lens behaves as a converging lens in air and a diverging lens in water (u = 4/3). What will be the condition on the value of refractive index (u) of the material of the lens ?
a ray of light passes through an equilateral glass prism such that angle of incidence is equal to the angle of emergence.if the angle of emergence is 3/4 times angle of prism.calculate the refractive index of prism.
the refracting angle of a glass prism of refractive index 1.45 is 60 degrees. At what angle should a light ray be incident at the first face of the at prism so that it emerges at the second face just parallel to the face??
if a covex lens is cut horizontally from the middle what will happen to its focal length?also consider the case of a concave lens.
6. In the displacement method, a convex lens is placed in between an object and a screen. If one of the magnification is 3 and the displacement of the lens between the two position is 24 cm, then the focal length of the lens is :
(a) 10 cm (b) 9 cm (3) 6 cm (4) 16/3 cm
you are given following three lenses. which two lenses will you use as an eyepiece and as an objective to construct an astronomical telescope?
L power aperture
L1 3D 8cm
L2 6D 1cm
L3 10D 1cm
Q.4. A square ABCD of side 1 mm is kept at distance 15 cm infront of the concave mirror as shown in the figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be :
(A) 8 mm
(B) 2 mm
(C) 12 mm
(D) 6 mm
draw a labelled ray diagram of compound microscope and explain its working.
plzz explain the construction and working og a compound microscope.... plzz
Use the mirror equation to deduce that:
(a) an object placed between f and 2f of a concave mirror produces a real image beyond 2f.
(b) a convex mirror always produces a virtual image independent of the location of the object.
(c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole.
(d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.
[Note: This exercise helps you deduce algebraically properties of
images that one obtains from explicit ray diagrams.]
state and explain faraday's laws of electromagnetic induction. deduce an expressionfor the induced emf in a coilrotating uniformly in a uniform magnetic field.
a ray of light is incident on a plane mirror along the direction given by vector A= 2i-3j+4k. find the unit vector along the reflected ray. (Take normal to the mirror along the direction of vector B= 3i-6j+2k)
An air bubble in a glass slab of refractive index 1.5 is 6cm eep as viewed from one face and 4cm deeo as viewed from the nother face. What is the thickness of the glass slab?
how does the focal length of a convex lens change if monochromatic red light is used instead of monochromatic blue light?
u >f from the mirror.Its image will have a length ---------
how to draw Compound Microscope ray diagram step wise?how to draw Compound Microscope ray diagram step wise?
Does critical angle depend on color of light? Explain.
Ans 1.321 please no links.
draw a labelled ray diagram to show the image formatin in a refracting type astonimical telescope.
Q.5. An observer is moving along the line AB as shown. When image of object O is first visible to observer, he starts from rest with the acceleration of 2 cm/, then the time for which image is visible to observer is
(1) 3 sec
(2) 9 sec
(3) 12 sec
(4) None of the above
What are Advantages of reflecting telescope over refracting telescope?
(a) -d, d
(b) d, d
(c) -d, -d
(d)d, -d
An object is placed at a distance of 15 cm from the convex lens of focal length 10 cm . on the other side of the lens , a convex mirror is placed such that its distance from the lens equals the focal length of the lens. The image formed by this combination is observed to coincide with the object itself. find the focal length of convex mirror..
A convex lens is placed in contact with the plane mirror. A point object at a distance of 20 cm on the axis of this combination has its image coinciding with itself. What is the focal length of the lens?
Q.103. The linear magnification is produced by a telescope having an objective of 50 cm and eyepiece of 5 cm focal length when used to read a scale 3m away is
1) 1.2
2) 2
3) 0.6
4) 4
Figure shows an equiconvex lens (of refractive index 1.50) in contact with a liquid layer on top of a plane mirror. A small needle with its tip on the principal axis is moved along the axis until its inverted image is found at the position of the needle. The distance of the needle from the lens is measured to be 45.0 cm. The liquid is removed and the experiment is repeated. The new distance is measured to be 30.0 cm. What is the refractive index of the liquid?.....
(a) A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification of the telescope?
(b) If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.48 × 106 m, and the radius of lunar orbit is 3.8 × 108 m.
Whats First and second principal focal length?