Planck's Equation

The Max Planck theorized that the energy was transferred in chunks known as quanta, equal to hv. The variable 'h' is the Planck's constant equals to 6.626176 x 10-34 joule-seconds and 'v' is the frequency of light. Light is represented as a photon (light particle). The Planck’s equation helps to calculate the energy of light when their frequency is known. The energy of a photon formula is just the product of Planck's constant and frequency of light.

Energy of a Photon Formula


e = h × v


e = Energy of Photon
h = Plancks Constant(6.63 × 10-34 J / s)
v = Light Frequency

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If the wavelength of the light/photon is known, you can calculate the light energy by using the wave equation to calculate the frequency and then apply Planck’s equation to find the photon energy.

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