In which frequency range, space waves are normally propagated?

Options

A. HF
B. VHF
C. UHF
D. SHF

Answer

To solve the question "In which frequency range, space waves are normally propagated?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Space Waves**:
- Space waves are a type of electromagnetic wave that can propagate through the atmosphere and are typically used in communication systems. They are important for line-of-sight communication.

2. **Identify the Frequency Range**:
- Space waves are generally associated with higher frequency ranges. The specific frequency range we are interested in is the Ultra High Frequency (UHF) range.

3. **Define the UHF Range**:
- The Ultra High Frequency (UHF) range is defined as frequencies from 300 MHz to 3000 MHz. This corresponds to wavelengths from 1 meter to 0.1 meters.

4. **Conclusion**:
- Based on the information, we conclude that space waves are normally propagated in the Ultra High Frequency (UHF) range, which is from 300 MHz to 3000 MHz.

5. **Select the Correct Option**:
- If options are provided, we would select the one that corresponds to the UHF range.

### Final Answer:
Space waves are normally propagated in the frequency range of **300 MHz to 3000 MHz** (Ultra High Frequency).

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