Question

When light moving in one medium falls at the surface of another medium, _______ light returns back to the same medium.

• A. all of
• B. a part of
• C. no
• D. either all or no

Answer 1

Answer: (B)

a part of

Light moving in one medium when falls at the surface of another medium, part of light returns to the same medium. Some part is transmitted and the rest is absorbed. No material is a perfect reflector. Almost all surfaces absorb some part of light.