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OpenStudy (anonymous):
if a beam of light from a He-Ne laser has a wavelength of 543 nm in air, what is its wavelength in water?
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OpenStudy (jack1):
whats the density of water?
OpenStudy (radar):
lamba water/lamba air=.73 (based on the refractive index of water. You can now set up the equation; lamba water/543 nm = .73
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