Problem: The wavelength of red helium-neon laser light in air is 632.8 nm.What is its wavelength in glass that has an index of refraction of 1.48?

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Wavelength in a medium is given by:

λmedium=λ0η

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Problem Details

The wavelength of red helium-neon laser light in air is 632.8 nm.

What is its wavelength in glass that has an index of refraction of 1.48?

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