A parallel-plate capacitor with circular plates of radius R is being discharged. The displacement current through a central circular area, parallel to the plates and with radius R/2, is 9.2 A. What is the discharging current?

The discharging current is

Explanation:

From the question we are told that  

     The radius of each circular plates is  R

     The displacement current is  

      The radius of the central circular area is  

The discharging current is mathematically represented as

where A is the area of each plate which is mathematically represented as

and   k is central circular area which is mathematically represented as

So  

substituting values

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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