A helium-neon laser beam has a wavelength in air of 633 nm


Question: A helium-neon laser beam has a wavelength in air of 633 nm. It takes 1.48ns for the light to travel through 31.0cm of an unknown liquid.

A- What is the wavelength of the laser beam in the liquid?

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Physics: A helium-neon laser beam has a wavelength in air of 633 nm
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