What is electromagnetic calculator?

A red laser emits a very narrow beam at a wavelength of approximately 650 nm (650×10-9m), which corresponds to a frequency of approximately 4.61×10 14 Hz , which is a few hundred terahertz!

The wavelengths of visible light are: Violet: 380–450 nm (688–789 THz frequency) Blue: 450–495 nm. Green : 495–570 nm.

This electromagnetic spectrum calculator converts between four parameters that define electromagnetic radiation: the frequency, the wavelength, the photon energy, and the temperature of a radiating black body for which the radiation curve reaches its maximum (peak wavelength).