Question

A ray of light falls on the surface of a spherical glass paper weight making an angle a with the normal and is refracted in the medium at an angle b. The angle of deviation of the emergent ray from the direction of the incident ray –

• A. (a _ b)
• B. 2(a _ b)
• C. (a _ b)/2
• D. (b _ a)

Answer 1

Answer: (B)

2(a _ b)

Answer 2

By the following ray diagram, it is clear that

d = (a _ b) + (a _ b) = 2 (a _ b)