Question

Fill in the blank spaces.

A ray of light striking the surface of a glass slab at ${90}^o$ travel along ___________.

• A. different path
• B. same path
• C. deviated path
• D. cant say

Answer 1

The correct option is B same path

It travels along the same path since the ray strikes at ${90}^o$ i.e. normally. When the ray strikes normally, the angle of incidence is $0^o$ and thus, angle of refraction is also $0^o$.