Answer: The spectrum of the sodium atom is detected in the

Chapter 44, Problem 44.31

(choose chapter or problem)

The spectrum of the sodium atom is detected in the light from a distant galaxy. (a) If the 590.0-nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the earth? (b) Use the Hubble law to calculate the distance of the galaxy from the earth.

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