A for the helium-neon laser estimate the doppler broadening, Ask an Expert

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(a) For the helium-neon laser, estimate the Doppler broadening of the output wavelength 632.8 nm at T = 243 K.

(b) Estimate the broadening of the same wavelength due to the Heisenberg uncertainty principle, assuming that the metastable state has a lifetime of about 3 ms.

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