Astraight non-conducting line has charges placed on it such that the charge density increases with distance from its center, 0, in both directions, and is given by \lambda = kx2 , where x is measured from 0 and k is a constant. the charged line subtends angle 2\alpha at a point p which is at a distance a from 0. find the electric field intensity at p, in terms of k, a, and \alpha. (note: if you use a variable angle in the integration, do not call it \alpha, which is just a constant)

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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3. dark matter

empty space could also be a simple vacuum