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runawaycluetrain t1_j8js05r wrote

Invisible means not in the visible range of the electromagnetic spectrum.

This concerns physics, not psychology or neurology.

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bkydx t1_j8juijt wrote

Thanks for being extra stupid while trying to sound smart but that isn't true.

X-rays/gamma rays/radio waves are not invisible to humans and they are part of the electromagnetic spectrum.

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