光子能量-频率计算器 — 公式

## 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.

计算示例

Green light at 500 THz (5e14 Hz).

  1. E = h f
  2. E = 6.626e-34 * 5e14
  3. E = 3.313e-19 J
  4. E = 3.313e-19 / 1.602e-19 = 2.069 eV
  5. lambda = 3e8 / 5e14 = 6e-7 m = 600 nm