Which range of frequencies can be transmitted suitable by sky wave propagation?

Options

A. 5kHz to 500 kHz
B. 1MHz to 2 MHz
C. 2 MHz to 20 MHz
D. Above 50 MHz

Answer

To determine the range of frequencies that can be transmitted suitably by sky wave propagation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Wave Propagation**:
- There are three main types of wave propagation: ground wave, sky wave, and space wave.

2. **Identify the Frequency Ranges**:
- **Ground Wave Propagation**: This type of propagation is effective for frequencies less than 2 MHz.
- **Sky Wave Propagation**: This is suitable for frequencies greater than 2 MHz and up to 20 MHz.
- **Space Wave Propagation**: This is used for frequencies greater than 30 MHz.

3. **Determine the Frequency Range for Sky Wave**:
- Based on the information, the frequency range for sky wave propagation is from 2 MHz to 20 MHz.

4. **Evaluate the Options**:
- If provided with multiple choice options, compare them to the identified range of 2 MHz to 20 MHz.
- For example, if the options are:
- A) 5 KHz to 500 KHz
- B) 1 MHz to 2 MHz
- C) 2 MHz to 20 MHz
- D) Above 50 MHz
- The only option that falls within the range of 2 MHz to 20 MHz is option C.

5. **Conclusion**:
- The suitable range of frequencies that can be transmitted by sky wave propagation is from 2 MHz to 20 MHz.

### Final Answer:
The range of frequencies that can be transmitted suitably by sky wave propagation is **2 MHz to 20 MHz**.

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