Question

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

100°

20°

50°​

Answer 1

Answer:

50°

Explanation:

because as we know the laws of reflection:

angle of reflection is equal to the angle of incidence

so,if reflection angle is 50°,then angle of incidence will be same as 50°

50°+50°=100°

Answer 2

Answer:

50

Explanation:

∠i + ∠r = 100°

Since, ∠i = ∠r

∴ ∠i + ∠i = 100°

⇒ 2 ∠i = 100°

⇒ ∠i = 100∘/2 = 50

∴ Angle of incidence = 50°.