How do you calculate the energy of a photon of electromagnetic radiation?

1 Answer
Trevor Ryan.
Jan 26, 2016

#E=hf#

Explanation:

A photon is a particle of light, but light has a dual nature, so it also has a corresponding wavelength and frequency.

We may find the frequency if we know the wavelength, since it travels at the speed of light, so we may use #c=flambda#.

Once we know the frequency, we may multiply it by Planck's constant to find its energy, which is then quantized, as it occurs in discrete multiples of Planck's constant #h=6.6xx10^(-34)J#, and the enrgy is given hence by
#E=hf#

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