Photon Energy Formula (E = hf)
E = h·f
What it means
The energy of a single photon is Planck's constant times its frequency — a cornerstone of quantum physics.
Variables
| Symbol | Quantity | SI unit |
|---|---|---|
E | energy | J |
h | Planck constant | J·s |
f | frequency | Hz |
Worked example
Given h = 6.6260e-34 J·s, f = 5.0000e+14 Hz, solve for E:
E = 3.3130e-19 J