Question

a) State the condition under which a light ray passes undeviated through a lens.
b) For the same angle of incidence of 45°, the angle of refraction in three transparent
media A,B,C are 25º, 30 and 35'respectively. In which medium is the speed of
light minimum and in which medium it is maximum?
c) What are the two factors on which lateral displacement of an emergent ray from a
glass slab depends ?​

Answer 1

Answer:

a. When it passes through the optical centre of the lens which is exactly at the middle of the lens.

b. In medium A its speed is minimum while in medium C its speed would be maximum.

c. (i) Thickness of glass slab.

(ii) Refractive index of glass slab.

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Answer 2

Answer:

a) a light ray passes undeviated through optical center .

b) ??? I don't know... sorry

c) 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.