what property of an EM wave describes its energy or how powerful it is?
In: Physics
This can be explained by [Photon Energy](https://en.wikipedia.org/wiki/Photon_energy) and the equation E = (h * c) / λ.
E is the Energy of the EM wave
λ is the distance of the wavelength
h is the Planck Constant (6.626*10^-34 Joule*second or 4.136*10^-15 electron volt*second)
c is the speed of light in a vacuum (2.998*10^8 meter/second)
This means that the energy of light is inversely proportional to the wavelength of the light (shorter wavelength = higher energy)
Also, since you can describe the frequency of an EM wave as *ν* = c/λ, that means that a wave’s energy is directly proportional to its energy (higher frequency = higher energy)
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