?Circular Apertures and Resolution(a) What is the minimum angular spread of a 633-nm
Chapter 4, Problem 57(choose chapter or problem)
Circular Apertures and Resolution
(a) What is the minimum angular spread of a 633-nm wavelength He-Ne laser beam that is originally 1.00 mm in diameter? (b) If this laser is aimed at a mountain cliff 15.0 km away, how big will the illuminated spot be? (c) How big a spot would be illuminated on the moon, neglecting atmospheric effects? (This might be done to hit a corner reflector to measure the round-trip time and, hence, distance.)
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