For a mechanical wave, the energy transported is directly proportional to the square of its amplitude.
In quantum physics, the energy of a photon is proportional to its frequency.
Will changing the frequency of light also affect its intensity?
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1$\begingroup$ maybe this link will interest you motls.blogspot.com/2011/11/… $\endgroup$– anna vCommented Sep 18, 2020 at 7:37
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Depends. For a general electromagnetic wave, there is no specific relation between the two. You can have a low-intensity, high-frequency wave (which has only a few photons), a high-intensity, high-frequency wave (which has more photons), a low-intensity, low-frequency wave (which has a large number of photons), or a high-intensity, low-frequency wave (which has an even larger number of photons). Any relation between frequency and intensity is determined by the specific details of whatever device is producing your electromagnetic radiation.
answered Sep 18, 2020 at 4:33