Show graphically the nature of variation of radius of orbit with the principal quantum number.

Explanation

To show graphically the nature of variation of the radius of an orbit with the principal quantum number \( n \), we can follow these steps:

### Step 1: Understand the Formula
The radius of the nth orbit in an atom is given by the formula:
\[ r_n = \frac{n^2 h^2}{4 \pi^2 m k Z e^2} \]
Where:
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