Always asked myself this…
Physician friend explained that to me but i dont get it, thats why ELI5…
In: 333
To be transparent, light has to be able to pass through an object.
In glass, the molecules are lined up in such a way that light can go through them. In tin foil, the atoms are arranged in a way that makes some light bounce off them; the rest of the light gets caught by the atoms, resulting in the foil’s silvery colour.
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