How does electromagnetism tell us that there is an invisible circle at every point in space and time; what does that mean, if we could see them, what would that even look like?
In: Physics
Those invisible circles are not actually there in any sense. We just use them in diagrams to denote gradients in forces.
Similar to a topographical map where these wavy shapes denote change in elevation around a hill and the closer lines are drawn the steeper the gradient.
We might draw circles around earth to show it’s gravitational field. These lines have no basis in reality because the gravitational field is EVERYWHERE. It just gets weaker the farther you are from earth. So we might draw circles very close togwther close to he earth and far apart farther from the earth.
This shows the rapidly decreasing strength of earths gravitational pull as you get farther away.
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