The red light of a wavelength 6400 Å in the air has a wavelength of 4000 Å in glass. If the wavelength of violet light in air is 4400 Å , then the wavelength in the glass is

Question

The red light of a wavelength 6400 Å in the air has a wavelength of 4000 Å in glass. If the wavelength of violet light in air is 4400 Å , then the wavelength in the glass is, 2570 Å, 2750 Å, 1600 Å, 2510 Å

MARKS App · Accepted Answer

μ g = λ r air λ r air Now, μ g = λ v air λ v glass = 6400 4000 λ v glass = λ v air μ g = 4400 1 .6 = 2750 Å

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