Photon Energy and Frequency Calculator
Calculate photon energy, frequency, and wavelength relationships
About this calculator
This photon energy and frequency calculator helps you determine the relationships between photon energy, frequency, and wavelength using fundamental physics equations. It's essential for students, researchers, and professionals working in quantum physics, optics, spectroscopy, and electromagnetic radiation studies. The calculator applies Planck's equation (E = hf) and the wave equation (c = fλ) to instantly convert between these interconnected photon properties, making complex quantum calculations simple and accurate.
How to use
Enter any one known value - photon energy (in joules or eV), frequency (in Hz), or wavelength (in meters or nanometers). The calculator will automatically compute the remaining two values using Planck's constant and the speed of light. Results are displayed in multiple units for convenient reference and practical applications.
Frequently asked questions
What is the relationship between photon energy and frequency?
Photon energy is directly proportional to frequency, described by Planck's equation E = hf, where h is Planck's constant (6.626 × 10⁻³⁴ J·s).
How are wavelength and frequency related for photons?
Wavelength and frequency are inversely related through c = fλ, where c is the speed of light (3 × 10⁸ m/s).
What units can I use for photon energy calculations?
Common energy units include joules (J), electron volts (eV), and kilojoules. Frequency uses hertz (Hz) and wavelength uses meters, nanometers, or angstroms.