If incident ray is fix and plane mirror is rotate by an angle theta then angle of reflected ray will be?
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Reflection angle is double of what plane mirror was rotated. Here in your question it's 2*theta.
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A ray of light is reflected by an angle about the normal after reflection.
Now, when the mirror itself is rotated by theta, the normal also rotates by theta
. So the ray of light is reflected at an angle theta about the Normal. Hence the total angle becomes:
theta(angle between the incident ray and normal) + theta ( angle between the normal and the reflected ray)=2*theta.
Now, when the mirror itself is rotated by theta, the normal also rotates by theta
. So the ray of light is reflected at an angle theta about the Normal. Hence the total angle becomes:
theta(angle between the incident ray and normal) + theta ( angle between the normal and the reflected ray)=2*theta.
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