Question: A particular HeNe laser beam at 633 nm has a spot size of 0.8 mm. Assuming a Gaussian beam, what is the divergence of the

A particular HeNe laser beam at 633 nm has a spot size of 0.8 mm. Assuming a Gaussian beam, what is the divergence of the beam? What are its Rayleigh range and beam width at 10 m?

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Chemistry 10th edition by Raymond Chang