Let be the area enclosed by the nth orbit in a hydrogen atom.The graph of against ln(n)

As denoted the area of the nth orbit and denotes the area of the first orbit.So,area of the nth orbit will be and that of the first orbit is



Thus,



Now, the nth radius is given by,



Therefore,


So,


On comparing the above with y=mx+c, we get




Thus, Hence , we obtain that the graph will be a straight line passing through the origin with a slope of 4.


Therefore, option A and B are correct.

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