Planck's Equation Energy=hf where h is Planck's Constant and f is the frequency.
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The energy of a basic unit of electromagnetic energy, the photon, is related directly to its frequency by a scaling factor called Planck's Constant, and the equation is often written e = Hf where e is energy unit, H is Planck's Constant and f is frequency unit.
velocity = frequency multiply wavelength Rearrange the equation to find the frequency
Frequency = Wave speed / Wavelength.
E = hv Where h is the Planck's constant v is the frequency of the photon and E is the energy of the photon
Wavespeed = frequency x wavelength