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Physics

Assertion A ray of light passing through the centre of curvature of a concave mirror is reflected back along the same path.

Reason The incident ray, the reflected ray and the normal at the point of incidence lie on the same plane.

  1. Both Assertion and Reason are true.
  2. Both Assertion and Reason are false.
  3. Assertion is false but Reason is true.
  4. Assertion is true but Reason is false.

Reflection of Light

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Answer

Both Assertion and Reason are true

Reason — According to the laws of reflection, angle of incidence = angle of reflection and the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane hence, when a ray of light passes through the centre of curvature of a concave mirror, it strikes the concave mirror at right angles to its surface due to which the angle of incidence and angle of reflection both are zero degree and the ray is reflected back along the same path.

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