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If a photon with a wavelength of 656 nm was emitted in a galaxy that is six billion lightyears away, when it reaches us its
If a photon with a wavelength of 656 nm was emitted in a galaxy that is six billion lightyears away, when it reaches us its wavelength will be Question 43 options: a) we have no way of knowing what its wavelength will be. b) 656 nm. c) quite a bit more than 656 nm. d) quite a bit less than 656 nm
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