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JEE Main202311 Apr 2023Evening ShiftPhysicsRay OpticsActual

When one light ray is reflected from a plane mirror with 30 ° angle of reflection, the angle of deviation of the ray after reflection is:

Options

  1. A120 °
  2. B110 °
  3. C140 °
  4. D130 °

Correct answer

A. 120 °

Step-by-step solution

It is given that i = 30 ° . The formula for angle of deviation is δ = 180 ° - 2 i Substituting the values, δ = 180 ° - 60 ° = 120 °

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