If a ray of light is incident on a plane mirror at an angle of incidence of 30°, then deviation produced by mirror is

Question

If a ray of light is incident on a plane mirror at an angle of incidence of 30°, then deviation produced by mirror is (A) 30° (B) 60° (C) 90° (D) 120°

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/5e9c323c5fb52bb7ac7458be6b1f5672-.png" /> As is clear from figure, Angle of deviation = angle A'O B=180°-60°=120°

Q. If a ray of light is incident on a plane mirror at an angle of incidence of $3 0^{\circ}$ , then deviation produced by mirror is

$3 0^{\circ}$

$6 0^{\circ}$

$9 0^{\circ}$

$12 0^{\circ}$

As is clear from figure,
Angle of deviation $= ∠ A^{'} OB = 18 0^{\circ} - 6 0^{\circ} = 12 0^{\circ}$

Q. If a ray of light is incident on a plane mirror at an angle of incidence of 30∘, then deviation produced by mirror is

30∘

60∘

90∘

120∘