A helium-neon laser, radiating at 632.8 nm, has a power output of 3.0mW. The beam diverges (spreads)
Question:
(a) What is the intensity of the beam 40 m from the laser?
(b) What is the power of a point source providing that intensity at that distance?
Transcribed Image Text:
Laser
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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