Question

which type of em wave has the longest wavelength?

a gamma rays
b violet visible light
c ultraviolet rays
d radio waves

Explanation:

Electromagnetic (EM) waves have different wavelengths. Gamma rays have very short wavelengths. Violet visible light has a shorter wavelength compared to some other EM waves. Ultraviolet rays also have relatively short wavelengths. Radio waves, on the other hand, have the longest wavelengths among the given options.

Answer:

D. radio waves