Question: An astronomer observes the Balmer-beta line in a celestial object'sspectrum at a wavelength of 496.5 nm. Is the object approaching orreceding? If you can find

An astronomer observes the Balmer-beta line in a celestial object'sspectrum at a wavelength of 496.5 nm. Is the object approaching orreceding? If you can find the object's radial velocity, what is it? (Note:The laboratory wavelength of Balmer-beta is given in Problem 10

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