Question: In the red shift of radiation from a distant galaxy, a certain radiation, known to have a wavelength of 434 nm when observed in the

In the red shift of radiation from a distant galaxy, a certain radiation, known to have a wavelength of 434 nm when observed in the laboratory, has a wavelength of 462 nm.

(a) What is the radial speed of the galaxy relative to Earth?

(b) Is the galaxy approaching or receding from Earth?

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