I think it has something to do with the fact that electromagnetic radiation travels (propagates) by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not require a medium of transport (such as the aether).
Put simply, radio waves are non corporeal, and would thus be the only type of 'stuff' that passes back and forth through a wormhole without the trappings of physical substances.
Of course, little is known about such things, since we have no access to a wormhole in this day and age.
Put simply, radio waves are non corporeal, and would thus be the only type of 'stuff' that passes back and forth through a wormhole without the trappings of physical substances.
Of course, little is known about such things, since we have no access to a wormhole in this day and age.
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