Question

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 the galaxy with
respect to earth is
(a) 2 × 10⁸ m/s (b) 2 × 10⁷m/s
(c) 2 × 10⁶ m/s (d) 2 × 10⁵ m/s

Answer 1

Answer:

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