The energy of the photon to will be calculated by using E=hv.
Photons are fundamental subatomic particles that carry electromagnetic force — or, to put it another way, they are light particles. The energy of a photon is calculated by determining the wavelength of the photon. To do this, we need to know the frequency of the light and its speed in a vacuum.
A hydrogen atom emits a photon with a frequency of about 6.6x1014 Hz and a speed in a vacuum of 3.0x108 m/s.
The value for E = hν is:
E = hν
= Planck's Constant × Frequency × Wavelength
= hc/(2π×frequency × wavelength)
The unit of energy is given by Joules(J).
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