Energy to Wavelength Converter

Convert electron volts (eV) to nanometers (nm) quickly and accurately for physics and engineering applications.

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About This Tool

This tool converts electron volts (eV) to nanometers (nm) using the fundamental physics formula λ = hc/E, where h is Planck's constant and c is the speed of light. It's essential for calculating the wavelength of photons from their energy, useful in fields like quantum mechanics, spectroscopy, and optical engineering. The converter supports multiple eV units (eV, keV, MeV) and provides precise results with scientific notation.

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How to Use

Enter the energy value in the input field.
Select the unit (eV, keV, or MeV).
Click the 'Convert' button.
View the result in nanometers (nm) with detailed calculation steps.

Frequently Asked Questions

Find Quick Answers

What is the formula used for conversion?

The tool uses λ = hc/E, where λ is wavelength in meters, h is Planck's constant (6.62607015×10⁻³⁴ J·s), c is the speed of light (299792458 m/s), and E is energy in joules. Electron volts are converted to joules using 1 eV = 1.602176634×10⁻¹⁹ J.

Can I convert keV or MeV to nm?

Yes, the tool supports electron volts (eV), kiloelectron volts (keV), and megaelectron volts (MeV). Simply select the unit from the dropdown menu before converting.

Is this tool accurate for scientific use?

Yes, it uses precise physical constants (CODATA 2018 values) and performs calculations with high precision, suitable for educational and professional applications.

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