Simulation · Chapter 2.3

Light Spectrum Explorer

Slide the wavelength. Watch the color, the energy and the wave change.

Wavelength

550 nm

Type a value (400 to 700):

400 nm violet550 nm700 nm red

What you see

green

Energy of one photon: 2.25 eV

Relative energy (400 nm = full bar)

My list: rank by energy

Add up to 8. Rank 1 = least energy, so the longest wavelength is rank 1.

Wavelength (nm)	Color	Energy (eV)	Energy rank (1 = least)
Nothing yet.

Rule: shorter wavelength = more energy per photon. Energy (eV) = 1240 divided by wavelength (nm). Color names are approximate. Violet is just before ultraviolet (UV). Red is just before infrared (IR).