The transition of electron from n = 3 to n = 1 in H atom produces

Options

A. Emission spectrum
B. Absorption spectrum
C. Paschen line
D. Pfund line.

Explanation

To solve the question regarding the transition of an electron from n = 3 to n = 1 in a hydrogen atom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Energy Levels**:
In a hydrogen atom, the principal quantum number (n) indicates the energy level of the electron. Here, we have n = 3 (higher energy level) and n = 1 (lower energy level).

2. **Understand the Transition**:
The transition from n = 3 to n = 1 means that the electron is moving from a higher energy state to a lower energy state. This transition involves the release of energy.

3. **Energy Release**:
When an electron transitions from a higher energy level to a lower energy level, energy is emitted. This energy can be released in the form of electromagnetic radiation, such as light.

4. **Emission Spectrum**:
The energy released during this transition corresponds to a specific wavelength of light, which is part of the emission spectrum of hydrogen. The transition from n = 3 to n = 1 specifically produces ultraviolet light and is part of the Lyman series.

5. **Conclusion**:
Therefore, the transition of an electron from n = 3 to n = 1 in a hydrogen atom produces an emission spectrum.

### Final Answer:
The transition of an electron from n = 3 to n = 1 in a hydrogen atom produces an emission spectrum.

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