SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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i = r
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i > r
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r > i
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i is not equal to r
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Detailed explanation-1: -According to the laws of reflection, the angle of incidence made by the incident ray with the normal must be equal to the angle of reflection made by the reflected ray with the normal i.e. i=r.
Detailed explanation-2: -According to the law of reflection, the angle of incidence (i) is equal to the angle of reflection (r).
Detailed explanation-3: -The angle of incidence is always equal to the angle of reflection. This is the first law of reflection.
Detailed explanation-4: -The angle of incidence is equal to the angle of reflection because the light ray selects the shortest path to reach the destination. This behaviour of light is known as Fermat’s principle. The same behaviour is shown by the light ray when it gets reflected from the plane surface.