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A ray of light is incident on a plane mirror at an angle of 40° with respect to a surface normal. When it gets reflected from the mirror it undergoes a deviation of

A ray of light is incident on a plane mirror at an angle of 40° with respect to a surface normal. When it gets reflected from the mirror it undergoes a deviation of Correct Answer 100°

Angle of deviation: It is the angle made by the reflected ray and the original path of the incident ray (as shown in the diagram)

  or  180°- 2i (as i=r) 

                                     = 180°-

                                     = 100°

Therefore, a ray of light will undergo a deviation of 100°

 

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