Answer:
7.546 × 10^13 Hz
Step-by-step 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