What speed should a galaxy move with res...

What speed should a galaxy move with respect to us so that the sodium line at 589.0 nm is observed at 589.6 nm ?

`306xx10^(-3)m//s`

`305xx10^(3)m//s`

`306xx10^(3)m//s`

`306xx10^(3)km/s`

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The correct Answer is:

For answer see Physics Darpan, Part-2, Section-B. Illustration of Textbook example no. 10.1

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