Does data transmitted wirelessly have mass, is it visible on any spectrum? Please explaing why for either yes or no, I’m confused.
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There are some good answers here, but I think mass-less photon “view” is not that helpful as ELI5. Imagine this: you and your friend are sitting on the other side of wall, all you have is compass, all he has is strong magnet. You both know morse code. So he just flips magnet for short and long intervals, and you look at compass. There, simple data transfer. No “things” were send “your way” specifically, he just modulated (electro)magntic field, and you have the right thing to detect the changes.
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