Question

Assertion: When a ray of light is normally incident on a shiny glass surface, it retraces its path. 

Reason: In case of normal incidence, the angle of reflection is 0°, hence the reflected say retraces its path along the normal.

Options

• If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

Explanation:

When light falls normally on a reflecting surface, $$i = 0^\circ$$. By the law of reflection, $$r = 0^\circ$$, meaning the reflected ray retraces its original path along the normal.