Question

What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?​

Answer 1

ANSWER:-

$45 {}^{0}$

Explanation:

Angle of incidence is equal to angle of reflection.

Answer 2

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Answer:

If the reflected ray is at the angle of 90o to the incident ray, then the angle of incidence is 45°. According to the law of reflection, the angle of incidence and the angle of reflection are equal. Therefore, the angle of incidence and the angle of reflection both are $\frac{90}{2}$=45°