Question

For a given incident ray a plane mirror is turned through 15degree the reflected ray turn through

Answer 1

Answer:

15 DEGREES

Explanation:

ANGLE OF INCIDENCE =ANGLE OF REFLECTION

Answer 2

Answer:

For a given incident ray a plane mirror is turned through 15° the reflected ray turn through 30°.

Explanation:

Let the surface of the plane mirror be M and the normal to it be N

Let the angle of incidence be θ, then  the angle of reflection is also θ (∵the angle of incidence = angle of reflection )

We know that, when the mirror M is rotated through an angle Φ, the reflected ray follows a deviation of 2θ:-

∴ Φ = 2θ

Given:-

When the plane mirror is turned through 15°, then the reflected ray turns through:

Φ = 2 × 15°

Φ = 30°

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