Answer to Question #197484 in Physics for Joshua

Question

A distant quasar is moving away from the earth at a speed u. An astronomer is searching for a certain spectral line in the light from the quasar. The line emmited by atomic hydrogen is observed using hydrogen discharge tubes on earth to have a wavelength of 121.6nm. The astronomer finds the hydrogen spectral lines emmitted by the quasar at wavelength of 460.9. Assuming the quasar to be moving radially away from earth what is the speed relative to the earth? Interpet your answer

Answer 1

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