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Lorentzian Spectrum. A light-emitting diode (LED) emits light of Lorentzian spectrum
with a linewidth Av (FWHM) = 1013 Hz centered about a frequency corresponding to a
wavelength A, = 0.7 µm. Determine the linewidth AA, (in units of nm), the coherence
time Te, and the coherence length la. What is the maximum time delay within which the
magnitude of the complex degree of temporal coherence [g(7)| is greater than 0.5?

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