Question

Which color in the visible spectrum has the highest frequency?

Answer 1

The color of the rainbow is yellow

Answer 2

Which color in the visible spectrum has the highest frequency?

The color in the visible spectrum that has the highest frequency is the violet. 

Violet waves have the most energy of the visible spectrum.

Remember:  c=fλ

Therefore:  f=c/λ

Here c is the speed of light in a vacuum.

So:

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.