Question

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

Answer 1

Correct Answer - c
The speed of light reduces when it travels from rarer to densere medium
when light travels from rarer to denser medium it bendds towards athe normal
thus speed of light is minimum when it bends maximum towards the normal for same angle of incidence i.e andgle of refraction is least so angle of refraction is least i.e `20^(@)` in medium s