Question
A helium-neon laser with an effective output aperture diameter of 1.5 mm emits 5 mW power at 633nm. If this laser radiation enters a human
A helium-neon laser with an effective output aperture diameter of 1.5 mm emits 5 mW power at 633nm. If this laser radiation enters a human eye with a lens focal length of 1.7cm, determine the irradiance of the focused spot on the retina.
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Astrophysics In A Nutshell
Authors: Dan Maoz
2nd Edition
140088117X, 9781400881178
