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Q: A point on the principal axis of a concave mirror, from where a ray of light reflects back without any deviation is :
  • A. infinity
  • B. centre of curvature
  • C. pole
  • D. principal focus
Correct Answer: Option B - A point on the principal axis of a concave mirror, from where a ray of lights reflects back without any deviation, is centre of curvature.
B. A point on the principal axis of a concave mirror, from where a ray of lights reflects back without any deviation, is centre of curvature.

Explanations:

A point on the principal axis of a concave mirror, from where a ray of lights reflects back without any deviation, is centre of curvature.