What is the frequency of 20-mm microwaves? (c = 3.0 × 10⁸ m/s) A)100 MHz B)400 MHz C)15 GHz D)73 GHz

Question

Quizplus · Accepted Answer

We know that the speed of electromagnetic waves (c) is given as c = λf, where λ is the wavelength and f is the frequency. Therefore, we can rearrange this equation to solve for f: 
f = c/λ

Given that the wavelength of the 20-mm microwaves is 20 mm = 0.02 m, we can plug in the values: 
f = (3.0 × 10^8 m/s) / (0.02 m) 
f = 1.5 × 10^10 Hz 
f = 15 GHz

Therefore, the frequency of the 20-mm microwaves is 15 GHz. Therefore, the best choice is C.

What Is the Frequency of 20-Mm Microwaves? (C = 3