[nabla9]

Microwave wavelength lower than visible light. It interacts with atoms differently by interacting with magnetic fields in atoms more.

There is:

- lines-of-sight propagation in free space,

- reflect from the surfaces like light (spectacular reflection)

- microwaves can be channeled trough tubes (think sound waves). If you fold a conductive material like tin foil multiple times, it can still work as a wave guide and escape.