write 3 difference between concave and convex lens?
write 3 differences between real and virtual images?
What is meant by lateral displacement?
Snell's law states that
u(constant of refraction) = sini/sinr
If a ray of light is passing through a glass slab through its normal, then sin i = 0 and thus the constant of refraction is not mantained.
But as the definition of snell's law suggests that this law is applicable to light travelling obliquely. If this is so, I have a question:
Refraction occurs due to the change in velocity of light in 2 different mediums. This change in velocity occurs as the atoms in a particular media has a specific frequency and if the light wave has a different frequecy, only then will it let the light pass through. But in this process, the light is refracted at some angle. BUT WHY DOES THIS REFRACTION NOT OCCUR WHEN LIGHT TRAVELS THROUGH THE NORMAL?
(I hope you understand the question. If not, pls tell me where I am not clear, i'll try to explain in a better way)
What is the meaning of virtual and erect image???
using mirror formula. prove that in a plane mirror
i)object distance=image distance
ii)image is of same size and it is virtual & erect.
derivation of mirror formula as well as lens formula ?
define power of lens and gives its S.I.unit
WHY CONVEX MIRRORS ARE USED AS VIGILANCE MIRRORS IN DEPARTMENTAL STORES ? WHAT IS THE PRINCIPAL BEHIND IT ?
State the Principle of reversibility of light
explain..why a pencil partly immersed in water appears to be bent at the water surface
what is tyndall effect?
define absolute refractive index of a medium.?
WHAT IS VIRTUAL AND ERECT IMAGE
One half of a convex lens is covered with a black paper.will such a lens produce an image of the complete object?support your answer with a ray diagram.
plz ans. fast as i hv a revision test on monday
write 3 differences between reflection and refraction
Calculate the focal length and nature of a spherical mirror which forms a 1/3 times magnified virtual mage of an object placed 18cm in front of it,
an object is placed at a distance of 10 cm from a convex mirror of focal length 15cm. find the position and nature of the image.
refractive index of glass with respect to air is 3/2..refractive index of water with respect to air is 4/3..what is the refractive index of glass with respect to water?? is it 3/2 divided by4/3 or 4/3 divided by 3/2??
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