Question

Assertion (A): For a plane mirror, the angle of reflection is always equal to the angle of incidence.

Reason (R): If an incident ray makes an angle of 35° with the surface of a plane mirror, then the angle of reflection will also be 35°.

Options

• Both A and R are true and R is correct explanation of the assertion.

• Both A and R are true but R is not the correct explanation of the assertion.

• A is true but R is false.

• A is false but R is true.

Answer 1

A is true but R is false.

Explanation:

Assertion (A) is true because the law of reflection states that the angle of incidence always equals the angle of reflection. However, Reason (R) is false because angles are measured from the perpendicular normal; an incident ray at 35° to the mirror surface creates a 55° angle of incidence (90° − 35°), making the angle of reflection 55° as well.