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A small miror is suspended by a thread a...

A small miror is suspended by a thread as shownin figure 2.35. A short pulse of mono-chromatic light rays is incident normally on the mirror and gets reflected. Which of the following statements is/are correct?

A

mirror will start to oscilate

B

wavelengths of reflected rays will be greater than that of incident rays

C

wavelength of reflected rays may be less than that of incident rays.

D

none of these

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