The ground wave propagation is suitable for radio waves of frequency

Options

A. up to 2 MHz
B. from 2 MHz to 20 MHz
C. from 2 MHz to 30 MHz
D. None of these

Answer

To solve the question regarding the suitability of ground wave propagation for radio waves of certain frequencies, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Ground Wave Propagation**: Ground wave propagation refers to the way radio waves travel along the surface of the Earth. This type of propagation is particularly effective for low-frequency radio waves.

2. **Identify Frequency Range**: It is known that ground wave propagation is most effective for frequencies up to 2 MHz. This is because at lower frequencies, the waves can diffract around obstacles and follow the curvature of the Earth, allowing for long-distance communication.

3. **Evaluate the Options**: The question provides four options regarding the frequency ranges suitable for ground wave propagation:
- Option 1: Up to 2 MHz
- Option 2: From 2 MHz to 20 MHz
- Option 3: From 2 MHz to 30 MHz
- Option 4: None of these

4. **Select the Correct Option**: Since ground wave propagation is effective for frequencies up to 2 MHz, we can conclude that:
- Option 1 (up to 2 MHz) is the correct answer.

5. **Final Conclusion**: Therefore, the ground wave propagation is suitable for radio waves of frequencies up to 2 MHz.

### Final Answer:
The ground wave propagation is suitable for radio waves of frequency **up to 2 MHz**.

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