Always asked myself this…
Physician friend explained that to me but i dont get it, thats why ELI5…
In: 333
Metals; which conduct electricity; are homes to mobile electrons, which absorb light. once an electron becomes immobile it cannot absorb light. glass is an oxide (SiO2), all of the silicon’s mobile electrons are bound up in bonds with oxygen atoms, if you combined the aluminum with oxygen, you’d get aluminum oxide, which when crystallized is known as clear sapphire,
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