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Q: 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 reflection
  • B. angle of emergence
  • C. angle of deviation
  • D. angle of incidence
Correct Answer: Option D - 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 angle of incidence.
D. 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 angle of incidence.

Explanations:

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 angle of incidence.