Determine the wavelength of the first Lymanline,the transition from `n=2"to"n=1`.In what region of the electromagnetic spectrum does this line lie ?

Explanation

To determine the wavelength of the first Lyman line corresponding to the transition from \( n=2 \) to \( n=1 \) in a hydrogen atom, we can follow these steps:

### Step 1: Understand the Lyman Series
The Lyman series corresponds to transitions where electrons fall to the \( n=1 \) energy level from higher energy levels (\( n=2, 3, 4, \ldots \)). The first Lyman line is the transition from \( n=2 \) to \( n=1 \).

### Step 2: Use the Rydberg Formula
The wavelength (\( \lambda \)) of the emitted photon during the transition can be calculated using the Rydberg formula:
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