What color light has the highest frequency?

2 Answers




Violet waves have the most energy of the visible spectrum.

Remember: #" "c=flambda#

Therefore: #" "f=c/lambda#

Here #c# is the speed of light in a vacuum.


As wavelength decreases, frequency increases and, as #E=hf#, where #h# is constant (Planck's constant), so does the energy that the waves carry. Waves with a short wavelength have the most energy.

Red waves have a relatively long wavelength (in the 700 nm range), and violet waves are much shorter - roughly half that.


Because violet waves have the shortest wavelength of the visible light spectrum, they carry the most energy.

Jul 24, 2015

I remember it as the highest frequency indicating the highest energy. The higher the frequency, the faster the oscillations and thus the higher the energy. Therefore, the highest-frequency ultra-violet light (or the lowest wavelength) is violet. However, the highest-frequency visible light would have to be roughly blue.

#200~400nm# is difficult to see, while #400~700nm# is more often the more visible end of the light spectrum.