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What is the wavelength in air of red light from a helium neon laser?

What is the wavelength in air of red light from a helium neon laser?
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What is the wavelength in air of red light from a helium neon laser?

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User P Roitto
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Answer:

632.8 nm is the wavelength (in air) of red light from a helium neon laser.

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User Hazimdikenli
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