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Photon Energy — result sheet
Calculate photon energy from wavelength using Planck's constant and the speed of light.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: E = h c / lambda, with wavelength converted from nanometers to meters.
Photon energy is inversely proportional to wavelength. The result is shown in joules and electron-volts using exact SI defining constants for h, c, and the elementary charge.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Wavelength — nm; minimum 1.0E-6; maximum 1000000000000
Worked example
| Input | Value |
|---|---|
| Wavelength | 500 |
Photon energy 3.9728917e-19 J, about 2.47968 eV.
Assumptions and limits
- The wavelength is a positive vacuum wavelength expressed in nanometers.
- The photon is modeled as a free electromagnetic quantum; material dispersion and detector response are not included.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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