First, the bad news. You'll never escape them. Never. Tune an old analog television set to an empty channel (haha jokes on you, they're ALL empty, fuckers!), and about 1% of that static you see is the Cosmic Microwave Background signal. More on that later.
"Microwaves" are waves of electromagnetic energy, The same phenomenon is responsible for the visible light we see. If we were able to tune our eyeballs to pick up different wavelengths such as microwaves, cell phone towers would probably be the brightest objects nearby.
(copy pasta follows) The Microwave Heating Principle Microwave heating is a multiphysics phenomenon that involves electromagnetic waves and heat transfer; any material that is exposed to electromagnetic radiation will be heated up. The rapidly varying electric and magnetic fields lead to four sources of heating. Any electric field applied to a conductive material will cause current to flow. In addition, a time-varying electric field will cause dipolar molecules, such as water, to oscillate back and forth. A time-varying magnetic field applied to a conductive material will also induce current flow. There can also be hysteresis losses in certain types of magnetic materials.
CMB The Cosmic Microwave Background radiation, or CMB for short, is a faint glow of light that fills the universe, falling on Earth from every direction with nearly uniform intensity. It is the residual heat of creation--the afterglow of the big bang--streaming through space these last 14 billion years like the heat from a sun-warmed rock, reradiated at night.
And that's all I have time for this morning.
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