Why are we able to receive wireless signals without direct line of sight?

Question

Based on my understanding, wireless signals are lights. Why can I use my gadgets inside a room?

In: 1

Answer 1

The only reason things like walls are “solid,” is because they block visible light. If instead of seeing visible light, we saw radio/microwaves, walls would look transparent since the materials walls are made of don’t block electromagnetic waves of those frequencies.