I’ve seen radio waved depicted in two different ways that seem at odds with one another. the first is something like [this](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Wireless_tower.svg/75px-Wireless_tower.svg.png), with the waves spreading out from a point source in all directions. the second is like [this](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Cross_linear_polarization.gif/330px-Cross_linear_polarization.gif) with the radio wave moving in a “tube” constrained by its own parameters.
since we can’t see them, radio waves remain a bit abstract, but both of these visualizations can’t be correct at the same time… or can they? can someone as to what the real picture would “look” like?
many thanks!
In: 3
The second one isn’t a visualization, it’s a graph (plot) of the electric field vector as a function of distance. The radio wave propagates in a straight line, but it’s made up of electric & magnetic fields whose orientations are perpendicular to the direction of travel.
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