That depends on the scale, gamma rays (shorter wavelength) penetrate better than light (longer wavelelength).
Shorter wavelengths have the problem where they actually bounce off buildings, and have a smaller maximal distance they can effectively travel.
However when it comes to 3G vs 4G vs 5G the frequency is a bit non homogeneous.
https://www.wpsantennas.com/cellular-frequency-information.aspx
I thought you only know Biochemistry ^^. Safe to say that spectroscopy played a role here?
You'd be surprised at things we are capable of knowing :)
I taught general chemistry for a while. I know a few more things here and there.
Thanks for the awesome response.
Thanks for the post to respond in :)