- #1
DaTario
- 1,056
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Hi All,
Let me see if I can put my doubt in words appropriately...
Imagine a source of EM radiation, say a laser beam, and suppose you are running against the laser's direction, i.e., photons go to positive x and you to negative x direction, for instance.
From the POV of SR, light does not change its velocity, but there is Doppler effect and the transfer of momentum and energy (from light to you) increases.
From the POV of QM, there is also Doppler effect and Planck's equation E = hv introduces also an increase in the energy and momentum of the photon.
I am considering that there is conservation of number of photons produced by the source in this context.
Do these two effects rest harmonically on the top of the same physicist's desk?
In other words, if photons are to be considered roughly packets of EM radiation, whose number are conserved in going from one reference frame to another, and if its velocity does not change in going from one reference frame to another so it must be that the energy ought to increase with the frequency. Does it make sense?
Best wishes
DaTario
Let me see if I can put my doubt in words appropriately...
Imagine a source of EM radiation, say a laser beam, and suppose you are running against the laser's direction, i.e., photons go to positive x and you to negative x direction, for instance.
From the POV of SR, light does not change its velocity, but there is Doppler effect and the transfer of momentum and energy (from light to you) increases.
From the POV of QM, there is also Doppler effect and Planck's equation E = hv introduces also an increase in the energy and momentum of the photon.
I am considering that there is conservation of number of photons produced by the source in this context.
Do these two effects rest harmonically on the top of the same physicist's desk?
In other words, if photons are to be considered roughly packets of EM radiation, whose number are conserved in going from one reference frame to another, and if its velocity does not change in going from one reference frame to another so it must be that the energy ought to increase with the frequency. Does it make sense?
Best wishes
DaTario
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