[Nicholas Lee (OP)]

Can em waves that traverse solid materials, change to become em waves that get absorbed by electrons, if the material is heated up, or cooled to freezing temperatures.
Heating, and freezing a solid material the em waves traverse through, does have an effect on how electrons absorb em waves.
How, and in what way I am unsure.
But as em waves like radio waves pass through a material, if the material suddenly was heated, or cooled, so that the em waves change to become em waves that absorb, the electrons in the material would move to higher shell levels, to the same shell/energy levels that are in glass.
Then MAYBE, the material could it become translucent a bit by 2%.
Remember the em waves were INSIDE the material as the em changed to em waves that absorbed.
This is all theory, but its just a idea.
I am grateful for your help, anything helps even a few words.

[puppypower]

One way to answer this is based on the observation that many super conducting materials occur near absolute zero. This observation suggests that cooling will cause materials to form states of matter, where the EM waves are perfectly reflected, inside the material, for lossless transmission.

As we heat the material; room temperature, most materials will expand, causing the atoms and their electron clouds to separate slightly. This will alter their reflection properties. The same material will now show more resistance; absorb the energy to a higher extent.

The absorption of energy, heats the material even more, for a cascading affect. In electronics, they will use heat sinks and fans, to keep the materials cool. This will limit resistance; energy absorption, by stopping the material from changing properties, beyond a given temperature; acceptable parameters.