What is the frequency of an electromagnetic wave with energy of 5.0 x 10-20

J?

3.3 * 10^-28

7.546 * 10^13 Hz

Explanation: Electromagnetic waves are types of waves that do not require a material medium for transmission. They include x-rays, radio waves, visible light, and microwaves among others. Electromagnetic waves travels at the speed of light and possess energy. Energy of electromagnetic waves is calculated by the formula, E = hf, where h is the plank's constant and f is the frequency of the wave.

In this case;

Energy, E = 5.0 * 10^-20 Joules

We are required to find the frequency, f

Using the equation;

E = hf

f = E : h

= 5.0 * 10^-20 J : 6.626 * 10^-34 J-s

= 7.546 * 10^13 Hz

= 7.55 * 10^13 Hz

Thus, the frequency of the electromagnetic wave is 7.55 * 10^13 Hz