Question
An incident ray goes along the reflecting surface. The reflected ray makes an angle of ____ degrees with the reflecting surface.
Hint:
According to the first law of reflection angle of incidence is equal to the angle of reflection.
The correct answer is: 0
If the light hits the plane mirror normally, that is, with the normal, the angle of incidence (the angle between the ray and the normal) is zero.
From the first law of reflection. angle of incidence, i = angle of reflection, r
Therefore, reflection angle = 0∘
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