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Home Q & A Board Science-Related Homework Help Physics
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zombiepixel zombiepixel
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12 years ago
We see gamma radiation coming from distant objects in the universe and they are captured in our various kinds of telescopes still at the wavelength they were when they were first emitted.  If a photon is emitted by an atom, will it ultimately lose energy as it travels through space?  And one other thing - is it conceivable that a photon literally has a physical connection with the atom that emitted it, even after a billion years?  (assuming that the atom that did the emitting is still in existence?
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wrote...
#1
12 years ago
No,light travels easily in vacuum
wrote...
#2
12 years ago
If a photon ever lost energy in a vacuum, it would slow down, but it has been shown that photons travel in a vacuum at a constant velocity of 3 x 10^8 m/s, so to answer your question, photons do not lose energy as they pass through a vacuum.
wrote...
#3
12 years ago
they probably do if they were absorbed by another object, but otherwise through vacuum .. i dont think so
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#4
12 years ago
The cosmological redshift is a loss of energy.
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#5
12 years ago
No but they lengthen.
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