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      Question

      When a light wave is reflected from a mirror, there is

      a change in its –
      A frequency Correct Answer Incorrect Answer
      B amplitude Correct Answer Incorrect Answer
      C wavelength Correct Answer Incorrect Answer
      D velocity Correct Answer Incorrect Answer

      Solution

      When a light wave is reflected from an object, it changes not only its amplitude but also its phase according to the properties of the object at a particular point. The velocity and momentum are just reversed in another direction.

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