a ray of light which strikes a glass slab from air at normal incidence passes through the slab
A
undeviated and undisplaced at a lower speed
B
deviated and undisplaced at a lower speed
C
deviated and displaced at a lower speed
D
undeviated and displaced at a faster speed
Verified Correct Answer: A.
Physical Principles & Numerical Solution
The angle of refraction will be zero as the angle of incidence is zero in this case. This is a rule, that whenever a ray strikes perpendicularly or normally to a surface, no refraction will take place and hence the ray will pass through without deviating from its path.
Source: Myschool Past Questions Archive (Record #9753)