Which of the boxes on the electromagnetic spectra shown below contains the range of frequencies with the most energy? assume that all wave amplitudes are equal.

A

Explanation:

The energy of an electromagnetic wave is directly proportional to its frequency, according to the equation:

E = hf

where

h is the Planck constant

f is the frequency

The frequency of a wave is the number of complete cycles per unit of time: in the figures shown, we see that the more we go towards the right, the higher the frequency is (because the wavelength becomes shorter, so the waves makes more complete cycles per second). This means that the more the box is on the right, the higher the frequency: the figure with the box located more on the right is A, so this is also the figure that represents the range of frequencies with most energy.