Physics, 21.01.2021 21:40 skyyman

One of the strongest emission lines observed from distant galaxies comes from hydrogen and has a wavelength of 122 nm (in the ultraviolet region). (a) How fast must a galaxy be moving away from us in order for that line to be observed in the visible region at 366 nm

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One of the strongest emission lines observed from distant galaxies comes from hydrogen and has a wav...