3 ms·
Because we're looking at the surface of a sphere, and that scales like r². Why do we look at the surface? Because every point at the surface has the same dista
by perlgeek 8y ago
Because we're looking at the surface of a sphere, and that scales like r².
Why do we look at the surface? Because every point at the surface has the same distance from the center, and so we expect the field to be the same on each point.