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For the same angle of incidence the angl...

For the same angle of incidence the angles fo refreaction in media P,Q ,R and S are `50^(@) ,40^(@),30^(@),20^(@)` respectively the speed of lights is minimum in medium

A

P

B

Q

C

R

D

S

Text Solution

Verified by Experts

The correct Answer is:
D
The speed of light reduce when it travels from rarer to denser medium.
When light travels from rarer to denser medium, it bends towards the normal.
Thus, speed of light is minimum when it bends maximum towards the normal for same angle of incidence, i.e. angle of refraction is least.
So, angle of refraction is least, i.e. `20^(@)` in medium S.
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