Question

A ray of light is incident on the pole of a concave mirror. The acute angle between the incident ray and the principal axis will be called?

• A. angle of emergence
• B. angle of incidence
• C. angle of reflection
• D. angle of deviation

Answer 1

Answer:

B. angle of incidence

• The angle of incidence is the angle between the incident ray and the normal to the surface at the point of incidence.

• The angle of incidence is always measured with respect to the normal, not the surface itself.

• It plays a crucial role in the laws of reflection (where the angle of incidence equals the angle of reflection) and refraction (where the angle of incidence is related to the angle of refraction by Snell's Law).

• Understanding the angle of incidence is essential for analyzing how light and other waves behave when they interact with different surfaces and media.