NEET Physics Question - Ray Optics - Reflection by Plane Mirror

Assertion (A): Any ray of light suffers a deviation of \(180° - 2i\) after one reflection from plane mirror.

Reason (R): For normal incidence of light on the plane mirror deviation is zero.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

For a plane mirror, the angle of deviation \(delta\) for an incident ray is given by \(delta = 180° - 2i\), where \(i\) is the angle of incidence. Thus, Assertion (A) is true. For normal incidence, \(i=0\), and the ray retraces its path, meaning its direction is reversed. This corresponds to a deviation of \(180°\), not zero. Hence, Reason (R) is false.

Rankers Physics

Plane Mirror Deviation

Solution:

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