The electromagnetic waves of frequency range 100 to 300 GHz are used in

Options

A. sky wave propagation
B. TV communication
C. microwave communication
D. ground wave communication

Answer

To determine the application of electromagnetic waves in the frequency range of 100 to 300 GHz, we can analyze the frequency ranges of various communication methods.

### Step-by-Step Solution:

1. **Identify the Frequency Range**: The question specifies a frequency range of 100 to 300 GHz.

2. **List Common Communication Methods and Their Frequency Ranges**:
- **Sky Wave Communication**: Operates in the frequency range of 3 to 40 MHz.
- **TV Communication**: Typically uses frequencies from 470 to 806 MHz.
- **Microwave Communication**: Covers a frequency range from 1 GHz to 1000 GHz.
- **Ground Wave Communication**: Functions below 3 MHz.

3. **Compare the Given Range with the Ranges of Communication Methods**:
- The frequency range of 100 to 300 GHz falls within the microwave communication range (1 GHz to 1000 GHz).
- The other communication methods (Sky Wave, TV, and Ground Wave) operate at frequencies much lower than 100 GHz.

4. **Conclusion**: Since the frequency range of 100 to 300 GHz is included in the microwave communication range, we can conclude that electromagnetic waves in this frequency range are used in microwave communication.

### Final Answer:
Electromagnetic waves of frequency range 100 to 300 GHz are used in **Microwave Communication**.

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