Question: He - Ne lasers are often used in physics demonstrations. They produce light of wavelength 6 3 3 nmnm and a power of 0 .

He-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633 nmnm and a power of 0.700 mWmW spread over a cylindrical beam 1.15 mmmm in diameter (although these quantities can vary).

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