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"

E=hf

Do not be misled by this equation: This equation gives the energy per photon. It turns out that if we double the fequency, we also double the number of photons increasing the intensity by a factor of four as expected.

"

I do not understand this last sentence. Is there some sort of equation relating intensity to energy because I thought intensity was just the number of photons :S

Anyone want to help?

thanks