Photon Energy-Frequency Calculator
Calculate the energy of a photon from its frequency using E = h * f, the Planck-Einstein relation.
Energia
0.0000000000000000003313000 J
Energy vs Frequency
Formula
## Photon Energy from Frequency A photon's energy is directly proportional to its frequency. ### Formula **E = h f** - *h* = 6.626 x 10^-34 J s (Planck constant) - *f* = frequency in Hz The wavelength is lambda = c / f. Higher frequency (shorter wavelength) means higher energy.
Exemplo Resolvido
Green light at 500 THz (5e14 Hz).
- 01E = h f
- 02E = 6.626e-34 * 5e14
- 03E = 3.313e-19 J
- 04E = 3.313e-19 / 1.602e-19 = 2.069 eV
- 05lambda = 3e8 / 5e14 = 6e-7 m = 600 nm
Perguntas Frequentes
What is the energy of a visible light photon?
Visible light spans about 1.65 eV (red, 750 nm) to 3.1 eV (violet, 400 nm).
How does photon energy relate to temperature?
The peak frequency of thermal radiation is proportional to temperature (Wien law). At room temperature, thermal photons are in the infrared.
Can a photon have any energy?
In principle yes, from radio waves (tiny energy) to gamma rays (MeV or more). The energy is quantised for a given frequency but the frequency itself is continuous.
Aprender