Max Planck proposed that energy is transmitted in packets (quanta) of
E = h ν
ν = nu = frequency of the radiation or waves
h = Planck's constant = 6.63 * 10⁻³⁴ J-sec
This is the minimum amount of energy that can be added-subtracted. A (imaginary) particle that holds this energy is called as a photon.
There is also an equation/law for electromagnetic radiation from a black body that is called Plank's law.
spectral radiance emitted by a black body is the amount of energy and power it
sends it off in the form of radiation in multiple frequencies.
expressed in terms of the power emitted by unit area of the body surface, captured
in a unit solid angle area, and per unit