Photon Energy Calculator
Calculate photon energy from wavelength or frequency
About this calculator
The Photon Energy Calculator determines the energy of electromagnetic radiation using either wavelength or frequency inputs. This tool applies Planck's equation (E = hf) and the wave equation (c = λf) to calculate photon energy in joules or electron volts. It's essential for physics students, researchers, and professionals working with quantum mechanics, spectroscopy, or electromagnetic radiation who need quick and accurate energy calculations for different wavelengths of light.
How to use
Enter either the wavelength (in meters, nanometers, or other units) or frequency (in Hz) of the electromagnetic radiation. Select your preferred energy unit output (joules or electron volts). Click calculate to instantly determine the photon energy using fundamental physics constants.
Frequently asked questions
What is the relationship between photon energy and wavelength?
Photon energy is inversely proportional to wavelength. Shorter wavelengths (like UV light) have higher energy, while longer wavelengths (like radio waves) have lower energy.
Can I calculate energy for all types of electromagnetic radiation?
Yes, this calculator works for all electromagnetic radiation including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
What units can I use for wavelength input?
The calculator accepts various wavelength units including meters, centimeters, millimeters, micrometers, nanometers, and angstroms for maximum convenience and flexibility.