Photon Energy Calculator | Photon Energy Formula
This page covers Photon Energy Calculator. It mentions Photon Energy formula or equation. The photon energy calculator calculates photon energy based on wavelength or frequency as input.
Photon energy Calculator #1 using wavelength
Following calculator calculates photon energy based on light wavelength.
Example Photon Energy calculator#1:
INPUTS : Light wavelength = 0.5 µm
OUTPUTS: Photon Energy = 3.97566 e-19 Joule
Photon Energy formula or equation
Following formula or equation is used for photon energy calculator#1. This calculator calculates photon energy based on walelength of the light source. This is known as Planck's equation.
Photon energy Calculator #2 using frequency
Following calculator#2 calculates photon energy based on light frequency.
Example Photon Energy calculator#2:
INPUTS : Light wavelength = 300 GHz
OUTPUTS: Photon Energy = 1.98 x 10-22 Joule
If light source power is given as P (in Watts) and each photon energy is E in joules, number of
photons (N) emitted per second can be calculated using following equation.
➨ N = P in Watts/E in Joules
Example: If P is 1 Watts and Energy of each photon is 4 x 10-19 , then
number of emitted photons in one second is equal to 2.5 x 108.
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