Question

When a light ray makes an angle of 90 degree while entering a glass slab from air it?
1.bends towards the normal
2.goes away from the normal
3.goes straight without be bending at point O
4.it returns back into water

Answer 1

The light ray goes straight without bending at point O (point of incidence).

Answer 2

Ans)
$it \: goes \: straight \: without \: bending \:$