The spectral series of the hydrogen spectrum that lies in the ultraviolet region is the

Options

A. Balmer series
B. Pfund series
C. Paschen series
D. Lyman series

Explanation

To solve the question about which spectral series of the hydrogen spectrum lies in the ultraviolet region, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Series of Hydrogen Spectrum**:
The hydrogen spectrum consists of several spectral series, which are categorized based on the transitions of electrons between energy levels. The main series are:
- Lyman series
- Balmer series
- Paschen series
- Brackett series
- Pfund series
- Humphreys series

2. **Identify the Regions of the Spectrum**:
Each series corresponds to a specific region of the electromagnetic spectrum:
- **Lyman series**: Ultraviolet region
- **Balmer series**: Visible region
- **Paschen series**: Infrared region
- **Brackett series**: Infrared region
- **Pfund series**: Far infrared region
- **Humphreys series**: Far infrared region

3. **Determine the Series in the Ultraviolet Region**:
From the categorization above, we can see that the only series that lies in the ultraviolet region is the **Lyman series**.

4. **Conclusion**:
Therefore, the spectral series of the hydrogen spectrum that lies in the ultraviolet region is the **Lyman series**.

### Final Answer:
The spectral series of the hydrogen spectrum that lies in the ultraviolet region is the **Lyman series**.

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