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A B Pippard1
Published under licence by IOP Publishing Ltd
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Citation A B Pippard 1994 Eur. J. Phys. 15 79
DOI 10.1088/0143-0807/15/2/007
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A circularly polarized electromagnetic wave suffers a change of frequency on going through a rotating half-wave plate, and the energy of a quantum is correspondingly changed. Solving Maxwell's equations in the rotating frame shows how the field amplitudes and Poynting vector are appropriately modified to account for the process.
