Question

Name a physical quantity which does not change with reflection?

Answer 1

Dear Student,
After reflection the waves return back in the same medium. The light waves and sound waves both undergo reflection and all the properties of wave remain intact.
After reflection the wavelength, frequency and velocity remain unchanged after reflection. The waves rturn back with the same speed with which they strike. The characteristics and nature of reflected waves are same so the frequency which is inverse of time period and wavelength also remain constant.

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