Electromagnetic waves that have a wavelength of 300 m in free space have a frequency of A)1 $\times$ 10^-3 Hz B)5 $\times$ 10⁵ Hz C)1 $\times$ 10⁶ Hz D)9 $\times$ 10⁶ Hz E)1 $\times$ 10¹¹ Hz

Question

Quizplus · Accepted Answer

The speed of light in free space is approximately 3 x 10^8 m/s. The frequency (f) and wavelength (λ) of an electromagnetic wave are related through the equation f = c/λ, where c is the speed of light. 
Therefore, f = c/λ = (3 x 10^8 m/s)/(300 m) = 10^6 Hz = 1 x 10^16 Hz. 
The closest choice to this answer is C, which is 1 x 10^16 Hz.

Electromagnetic Waves That Have a Wavelength of 300 M in Free