Question

When light ray makes an angle of 90°while entering a glass slab from air, it ________________
A. It bends towards the normal
B. Goes away from the normal
C. Goes straight without bending
D. It returns back into water

Answer 1

C) Goes straight without bending..
Because here angle of incidence is 0 degree so angle of deviation will also be 0 degree...

Hope it helps....:))

Answer 2

When light ray makes an angle of 90°while entering a glass slab from air, it

Goes straight without bending

i.e C]Goes straight without bending