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Consider a composite wave formed by two plane waves with slightly different frequencies of
@1 = 2.7 × 10'" rad/s and w2 = 2.9 × 102 rad/s
and respective wavelengths 11
17.0 nm and 12 = 16.0 nm. Calculate the wavelength of the
%3D
envelope wave and give your results in units of nm with 1 digit precision, rounding off to one
decimal place, i.e. the nearest tenth. (time budget 6min)

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