Question: Estimate the angular spread of a laser beam due to diffraction if the beam emerges through a 3.0-mm-diameter mirror. Assume that = 694 nm.

Estimate the angular spread of a laser beam due to diffraction if the beam emerges through a 3.0-mm-diameter mirror. Assume that λ = 694 nm. What would be the diameter of this beam if it struck?

(a) A satellite 340 km above the Earth,

(b) The Moon?

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The angular halfwidth of the beam is given in Eq 257 where d is the diameter of the diffract... View full answer

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