He–Ne lasers are often used in physicsdemonstrations. They produce light of wavelength 633 nm and a powerof 0.500 mW spread over a cylindrical beam 1.00 mm in diameter(although these quantities can vary). What is the average energy density in the laser beam?
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He–Ne lasers are often used in physics
demonstrations. They produce light of wavelength 633 nm and a power
of 0.500 mW spread over a cylindrical beam 1.00 mm in diameter
(
although these quantities can vary). What is the average energy density in the laser beam?
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