Question

Fill in the blank:

When angle of incidence increases, glancing angle of incidence ________.

• A. decreases
• B. increases
• C. remains same
• D. becomes zero

Answer 1

Answer: (A)

decreases

Glancing angle is the angle between incident ray and reflecting surface and it is represented by $g$.

Angle of incidence $+$ Glancing angle of incidence $={90}^0$

So, Glancing angle of incidence $={90}^0-$ Angle of incidence

This means, when angle of incidence increases, glancing angle of incidence decreases,