A 2.0 m × 4.0 m flat carpet acquires a uniformly distributed charge of −−10 μC after you and your friends walk across it several times. A 4.5 μg dust particle is suspended in midair just above the center of the carpet.
What is the charge on the dust particle?

the answer is to check all of them! they all apply well at least i think so!

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.

hope this ! this is not copied! search it up, it's free of plagiarism!