Explanation: Electromagnetic waves are types of periodic waves. They propagate with the same speed as light (3 * 10⁸ m/sec). Therefore: velocity of wave = c
Now, the equation that relates speed of wave and its frequency is as follows: c = λf where: c is the speed of wave f is the frequency of the wave λ is the wavelength of the wave
Solve the above equation for frequency, we will end up with: f = c / λ
