Main Question or Discussion Point
Is there is theoretical limit on how large a frequency (or how small a wavelength) an EM wave can have?
unfortunately, many of the physical theories we have are strictly valid at a relatively low energy... since freq is related to energy... so you may have problems when things go extremely large... but that doesn't mean there is definitely a limit..it is just a statement saying that we don't know ..yetIs there is theoretical limit on how large a frequency (or how small a wavelength) an EM wave can have?
So what happens in a photon-photon collision? There should be infinite frequencys involved?in Doppler's effect, the frequency goes to infinity as one approaches a light source close to the speed of light... so if there is a limit on how high frequency goes and Doppler's effect is correct, then there is limit (lower than c) on how fast one can travel toward a light source. similarly, if there is a lower bound on frequency, then there is a limit (lower than c) on how fast one can travel away from a light source.
This doesn't sound correct. No matter how great the energy of a photon is, there is always another frame, where the energy is arbitrarily small. If a photon could change into another particle, it should not depend on the chosen frame.actually if you pump enough energy into a photon it will entually become a different kind of boson, I forgot the particulars however.
Certainly. I didn't mean that tim_lou's conclusion have to be wrong, I know doppler effect equation and how it works. Mine was just a question.lightarrow:
Infinities are very frequently serious problems in physics.