Question

When light passes through a window pane: A) The wavelength remains constant. B) The energy per...

When light passes through a window pane:

A) The wavelength remains constant.

B) The energy per photon doubles.

C) The frequency remains constant.

D) The speed remains constant.

E) None of the above.

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Answer #1

C) The frequency remains constant.

This is so because the electric and magnetic fields have to remain continuous at refractive index boundary. If the frequency changed so often, then the relative phase will keep on changing and fields would never match.

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