Photon Energy (E=hc/λ) Calculator
Calculate photon energy from wavelength in eV and Joules.
nm
Result
2,4797 eV
Photon energy: 2.4797 eV
Result in all units
Step-by-step solution
E = hc / λ
What Is Photon Energy?
Photon energy is the energy carried by a particle of light (a photon). It is directly proportional to the frequency of light and inversely proportional to its wavelength.
How is it calculated?
How Is It Calculated?
E = h × f = h × c ÷ λ
h = 6.626×10⁻³⁴ J·s, c = 3×10⁸ m/s.
- Enter the frequency or wavelength.
Frequently Asked Questions
Which light is more energetic?
Light with a shorter wavelength (for example violet and ultraviolet) carries more energy than red light.