Comment on Cherenkov RadiationparentComments−pfdietz23hIn water photons travel at say 200,000km a second.It really depends on the energy of the photons. There is "dispersion". It's the same effect that causes a prism to split white light into different wavelengths.
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It really depends on the energy of the photons. There is "dispersion". It's the same effect that causes a prism to split white light into different wavelengths.