Calculate the wavelength of the first and the last line in the Balmer series of hydrogen spectrum?

Explanation

To calculate the wavelength of the first and last lines in the Balmer series of the hydrogen spectrum, we can follow these steps:

### Step 1: Understand the Balmer Series
The Balmer series corresponds to electronic transitions in hydrogen where the electron falls to the n=2 energy level from higher energy levels (n=3, 4, 5, ...). The formula for the wavelength (λ) in the Balmer series can be derived from the Rydberg formula:

\[ \frac{1}{\lambda} = R_H \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right) \]
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