Question

radio waves have long wavelengths. what does that tell us about their frequency? they have low frequency. frequency is unrelated to wavelength. they have high frequency.

Explanation:

The relationship between wavelength ($\lambda$) and frequency ($f$) of a wave is given by the formula $c = \lambda f$, where $c$ is the speed of light (a constant in a vacuum, $c\approx3\times10^{8}\text{ m/s}$). Rearranging for $f$, we get $f=\frac{c}{\lambda}$. Since $c$ is constant, when $\lambda$ (wavelength) is large (as in radio - waves), $f$ (frequency) will be small.

Answer:

They have low frequency.