Question

What is the angle of incidence of a ray iſ the reflected ray is at an angle of 90° to the incident
(a) 60°
(b) 45
(0) 909
(d) 180​

Answer 1

Answer:

The correct option is B) 45°

Step-by-step explanation:

According to the law of reflection, the angle of incidence is equal to the angle of refraction.

That is, ∠i=∠r. Let it be x.

In this case, the difference between the angle of incidence and angle of refraction is 90 degrees.

Given, ∠i+∠r = 90 degrees

or, x+x=90°

or, x=45°

Hence, the angle of incidence is 45°.

Answer 2

Answer:

180 is your answer I hope it helps you