main menu MyCT
Main
Forum
Energy to no. photons

     Chemical Sciences index
Photochemistry index
Energy to no. photons diagram
calc
The number of photons of a particular wavelength in a given energy is calculated by use of the equation for photon energy, E = hc/λ (where h is Planck's constant).
Energy
Wavelength

Photons
Add login to add

notes
For reference, the wavelength of ultraviolet light is in the range 100-400 nm, visible light is in the range 400-800 nm, and infrared light is in the range of 800 nm - 10 microns and beyond.
The units menu allows you to choose, for example, to quote the number of photons in moles in the case that it is more convenient.