Question

microwaves have low frequencies. what does that tell us about their wavelengths? they have short wavelengths. wavelength is unrelated to frequency. they have long wavelengths.

Explanation:

The relationship between frequency ($f$) and wavelength ($\lambda$) for electromagnetic waves (including microwaves) is given by the formula $c = f\lambda$, where $c$ is the speed of light (a constant). Rearranging for $\lambda$ gives $\lambda=\frac{c}{f}$. Since $c$ is constant, when $f$ (frequency) is low, $\lambda$ (wavelength) must be large (because dividing a constant by a small number gives a large result). So, low - frequency microwaves have long wavelengths.

Answer:

They have long wavelengths.