Question

The angle between the incident ray and reflected ray is 100°. What is the value of angle of incidence?

Answer 1

Explanation:

The angle of reflection is 60 degrees. (Note that the angle of incidence is not 30 degrees; it is 60 degrees since the angle of incidence is measured between the incident ray and the normal

Answer 2

Answer:

angle I + angle R + 100° = 180° (linear pair because all lie in the same plane and angle I = angle R )

2 ( angle I ) = 80°

angle I = R = 40 °

hope it is correct..