Determine the frequency of revolution of an electron in the second Bohr orbit in hydrogen atom

Explanation

To determine the frequency of revolution of an electron in the second Bohr orbit of a hydrogen atom, we can follow these steps:

### Step 1: Understand the Formula for Frequency
The frequency of revolution \( f_n \) of an electron in the nth orbit can be given by the formula:
\[ f_n = \frac{V_n}{2\pi R_n} \]
where \( V_n \) is the speed of the electron in the nth orbit and \( R_n \) is the radius of the nth orbit.
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