What is it that determines whether or not an electromagnetic wave can penetrate different materials and how far it can go? For example light can penetrate through glass, but not concrete walls, but radio waves can penetrate concrete walls in large distances
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$\begingroup$ see “skin depth” with explicit expression: en.wikipedia.org/wiki/Skin_effect#Formula $\endgroup$– ZeroTheHeroCommented Jan 3, 2021 at 5:49
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$\begingroup$ Do you understand why electric fields cant penetrate a conductor? $\endgroup$– R. EmeryCommented Jan 3, 2021 at 6:04
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$\begingroup$ no I didn't know about that $\endgroup$– user284476Commented Jan 3, 2021 at 15:37
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