Question : A light wave is incident over a plane surface with velocity x. After reflection, the velocity becomes:
Option 1: x/2
Option 2: x
Option 3: 2x
Option 4: x/4
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Correct Answer: x
Solution : The correct option is x.
When a light wave is incident on a plane surface, its velocity remains unchanged after reflection. The speed of light is determined by the properties of the medium it is travelling through. In a uniform medium, like air, the velocity of light remains constant, unaffected by reflection off a surface.
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