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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 18 - Atoms and Nuclei > In hydrogen spectrum the wavelength of Hα line is 656 nm; whereas in the spectrum of a distant galaxy Hα line wavelength is 706 nm. Estimated speed of galaxy with respect to earth is

In hydrogen spectrum the wavelength of Hα line is 656 nm; whereas in the spectrum of a distant galaxy Hα line wavelength is 706 nm. Estimated speed of galaxy with respect to earth is

In hydrogen spectrum the wavelength of Hα line is 656 nm; whereas in the spectrum of a distant galaxy Hα line wavelength is 706 nm. Estimated speed of galaxy with respect to earth is