Question

Q.16 a) The angle between incident ray and reflected ray is 60°. What is the value of angle of
incidence?

Answer 1

1/2 of 60 = 30 ...

30 is the angle of incidence

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Answer 2

Given :

• Angle between incident ray and reflected ray = 60°

To find :

• Value of angle of incidence

Solution :

Here, we are given the value of angle between incident ray and reflected ray.

It means that the,

• Incident ray + Reflected ray = 60°

As we know that,

• Angle of incidence = Angle of reflection

So, let us assume the angle of incidence as a.

⠀⠀⠀⇒ a + a = 60°

⠀⠀⠀⇒ 2a = 60°

⠀⠀⠀⇒ a = 60°/2

⠀⠀⠀⇒ a = 30°

The value of a = 30°.

Therefore, the value of angle of incidence and angle of reflection = 30°.

Answer,

• Value of angle of incidence = 30°

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Know MorE :-

Angle of Incidence :

• The angle made by the incident ray with the normal is called angle of incidence.

Angle of reflection :

• The angle made by the reflected ray with the normal is called angle of incidence.

Incident ray :

• A ray of light which travels towards the mirror is called incident ray.

Reflected ray :

• A ray of light which bounces off from the surface of mirror is called reflected ray.

Law of reflection :-

• The incident ray, reflected ray and the normal lie in the some plane at the point of incidence.

• Angle of incidence = angle of reflection