The wavelength of H α line in the hydrogen spectrum is found to be 6563 Å in the laboratory. If the velocity of the milky way is 1.05 × 10 6 m s - 1 , then the wavelength of H α line in the spectrum of milky way will be

Question

The wavelength of H α line in the hydrogen spectrum is found to be 6563 Å in the laboratory. If the velocity of the milky way is 1.05 × 10 6 m s - 1 , then the wavelength of H α line in the spectrum of milky way will be, 6457 Å, 6586 Å, 7123 Å, 7349 Å

MARKS App · Accepted Answer

As λ = ∆ λ × c v or ∆ λ = λ × v c ∆ λ = 6563 × 1.05 × 10 6 3 × 10 8 Å = 2297 × 10 - 2 = 22.97 Å ≈ 23 Å ∴ New wavelength is 6563 + 23 Å = 6586 Å

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