- #1
ckuze
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My teacher told us energy at a point of a progressive wave is proportional to square of amplitude, it is true for both mechanical and electromagnetic wave.
But in the other lesson, he also tols us the energy of the EM wave is equal to hv, where h = Planck constant, v = frequency of the wave. So gamma ray has a higher energy than radiowave, but if the frequency is the same, such as X-ray and gamma ray, they have same energy.
But the EM wave still have large or small amplitude, so the energy of a EM wave depends on th frequency or amplitude or both?
But in the other lesson, he also tols us the energy of the EM wave is equal to hv, where h = Planck constant, v = frequency of the wave. So gamma ray has a higher energy than radiowave, but if the frequency is the same, such as X-ray and gamma ray, they have same energy.
But the EM wave still have large or small amplitude, so the energy of a EM wave depends on th frequency or amplitude or both?