Question

which of the following has the highest energy?
a -blue light
b-violet light
c-cyan light
d-green light

Answer 1

Violet waves have the most energy of the visible spectrum.

Remember:  c=fλ

Therefore:  f=cλ

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.