Question

Radio waves and microwaves are similar because they both have

Answer 1

The correct answer is

b. low frequencies and low energy.

In fact, microwaves and radio waves have frequency up to $10^{10}-10^{11} Hz$, which are really low compared, for instance, to the frequency of gamma rays ($10^{20} Hz$). Moreover, the energy of an electromagnetic wave is directly proportional to its frequency:

$E=hf$

where h is the Planck constant and f the frequency; therefore, low frequency means also low energy.