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Photon Energy (E = hf)

Calculate Photon Energy (E = hf) instantly with the exact formula and a worked example.

Photon Energy (E = hf)

λ, nm
E, eV
2.2545
Calculate Photon Energy (E = hf) instantly with the exact formula and a worked example.

More about: Photon Energy (E = hf)

What it calculates

The “Photon Energy (E = hf)” calculator computes E, eV from 1 parameter: λ, nm.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters λ, nm = 550 the result is 2.25.

How to use

  1. Enter λ, nm — each field above is adjustable with a slider.
  2. E, eV is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Photon Energy (E = hf) calculated?
The Photon Energy (E = hf) calculator computes E, eV from λ, nm. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Photon Energy (E = hf) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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