=> v of atoms = √(λ / 3,32 × 10^-52) ( m/s).
The energy of photons and the energy of atoms are inversely proportional to each other. This binding allows everything in the universe to exist (because photons and atoms are the two particles that create everything, and are the most numerous particles in the universe).
* Energy of Photons × Energy of Atoms = 1.
<=> (h × c / λ) × (m × v^2) = 1.
Note:
λ: wavelength (m)
m: the mass of atoms (Kg), m = 1,67 × 10^-27 Kg.
h: the Planck's constant, h = 6.625 × 10^-34 (J.s).
c: speed of light. The speed of photons is usually fixed by measurement, c = 3 × 10^8 (m/s).
v: is the velocity of the atoms, similar to the velocity of all types of waves, lightning, etc., its value changes, it is not immeasurable (m/s).
=> v = √(λ/(m × h × c))
=> v = √(λ / 3,32 × 10^-52) ( m/s).
=> The velocity of Atoms are often change: depends on the each type of wavelength.