maybe the skin example was a bad one.
here's another one: it's better to wear dark hats and clothes for uv protection rather than white ones. a scientist said this somewhere, but s/he didnt exactly explain why. it seems counterintuitive to me.
OK, so people say that wearing white is better than wearing black in the sun because white reflects light whereas black absorbs light.
But at the same time it is said that black is better for sun protection (for example, darker skinned people are much less likely to get skin cancer than...
to answer the first question, there is no uniformity on a flat surface because the field lines hit the surface at different distances. I am pretty sure of this.
if the r gets smaller, then the electric field should increase, and it should become more uniform...
so the center of the cube should have a stronger electric field. the electric field should not be uniformly distributed.
and if the dimensions of the cube shrink, then the field lines would look like they're denser...
i think... I am not sure. am i closer to the truth? ^^
There is a positive charge located at the center of a cube.
are the intersections of the field lines with a side of the box uniformly distributed across that side? (can someone also give a clear definition of what uniformly distributed means?)
describe how the field lines for the positive...