Co hai dien tich q1 = - 5.10^-9 va q2 = 8.10^-9 dat cach nhau mot khoang 10 cm . Xac dinh vecto cuong do dien truong tai : a) Diem M nam tren duong thang di qua hai dien tich va cach deu hai dien tich b) Diem N voi N cach q1 = 5cm va cach q2 = 15cm

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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