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1900's Physics and Wave

The potential...

Question

The potential energies of first, second and third Bohr's orbits of He $^{+}$ cation are $E_{1}$ , $E_{2}$ and $E_{3}$ . Then What will be the correct sequence of these energies?

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Solution

Potential energy $\propto \frac{1}{n^{2}}$
so, $E_{1} > E_{2} > E_{3}$

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