ELi5: Why do 5GHz wifi signals have trouble passing through walls compared to 2.4GHz wifi signals even though higher frequency means more energy and thus more penetration power?

Question

Please make me understand this as I’ve been trying to figure it out and it’s been bugging me so much!!

In: Physics

Answer 1

Because frequency times wavelength is a constant. Or in other words, as frequency goes up, wavelength goes down.

As wavelength changes, it will be more affected by certain mediums and less by others. I guess a generic wall has a construction that particularly affects waves in the 5GHz frequency.