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In the Figure Below, Three Identical Photons Were Each Emitted

question 36

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In the figure below, three identical photons were each emitted when their local scale factor was RU = 0.5.Each is then measured after the scale factor of the universe changes to a different amount, as shown.Which photon will be measured to have the greatest cosmological redshift? In the figure below, three identical photons were each emitted when their local scale factor was R<sub>U</sub> = 0.5.Each is then measured after the scale factor of the universe changes to a different amount, as shown.Which photon will be measured to have the greatest cosmological redshift? A) the one at R<sub>U</sub> =1 B) the one at R<sub>U</sub> = 2 C) the one at R<sub>U</sub> = 3 D) The photons at R<sub>U</sub> = 2 and 3 will be identical, and have the greatest redshift. E) All three will have the same cosmological redshift.

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