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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It depends on precisely what you mean by “mass”. Relativity tells us that mass and energy are the same, so in that sense anything with energy has mass in some sense.
Usually, if you use that term, you mean *rest* or *invariant* mass, which is what corresponds to mass in classical physics and is the mass(-energy) an object would have it it were not moving. Light (and therefore radio waves) have zero *rest* mass, but have non-zero mass-energy.
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