Planck-Einstein Energy of Light Equation
Reference from the original Physics I textbook.
- Planck-Einstein Energy of Light Equation
and since we know that , it can be rewritten as:
E = energy of one photon (J); h = Planck’s constant ≈ 6.626 × 10⁻³⁴ J·s; f = frequency (Hz); λ in E = hc/λ is the vacuum wavelength (m).
- Related Glossary Terms
- Index
Reviewed physics notes (1)
These corrections keep the original lesson’s purpose while fixing errors in the source edition.
- hf is energy per photon, not total beam energy; wavelength must correspond to c. — Reference 1
Glossary and deeper reading · 1 refreshers
These editorial refreshers supplement the reading. Definitions and examples are added guidance; original source wording and recorded answers remain in their original context.
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Planck’s constant
Planck’s constant relates the energy of a photon to its frequency. It also sets the scale connecting particle momentum to de Broglie wavelength. For example, two photons of different frequencies have energies in the same ratio as their frequencies because the constant is the same for both.