Three waves A,B and C of frequencies 1600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another.Which of the following is the appropriate mode of communication?

Options

A. A is transmitted via space wave while B and C are transmitted via sky wave
B. A is transmitted via ground wave, B via sky wave and C via space wave
C. B and C tranmitted via ground wave while A is trasnmitted via sky wave
D. B is transmitted via ground wave while A and C are transmitted via space wave.

Explanation

To determine the appropriate mode of communication for the waves A, B, and C with frequencies 1600 kHz, 5 MHz, and 60 MHz respectively, we need to analyze the modes of communication based on the frequency ranges.

### Step-by-Step Solution:

1. **Identify the Frequencies**:
- Wave A: 1600 kHz
- Wave B: 5 MHz
- Wave C: 60 MHz

2. **Convert Frequencies for Comparison**:
- Convert 1600 kHz to MHz:
\[ 1600 \text{ kHz} = \frac{1600}{1000} \text{ MHz} = 1.6 \text{ MHz} \]
- Therefore, the frequencies are:
- Wave A: 1.6 MHz
- Wave B: 5 MHz
- Wave C: 60 MHz

3. **Understand the Modes of Communication**:
- **Ground Wave Propagation**: Effective up to 3 MHz.
- **Sky Wave Propagation**: Effective from 3 MHz to about 30-40 MHz.
- **Space Wave Propagation**: Effective for frequencies above 30-40 MHz.

4. **Determine the Mode for Each Wave**:
- **Wave A (1.6 MHz)**: This frequency is less than 3 MHz, so it will be transmitted via **Ground Wave**.
- **Wave B (5 MHz)**: This frequency is between 3 MHz and 30 MHz, so it will be transmitted via **Sky Wave**.
- **Wave C (60 MHz)**: This frequency is greater than 30 MHz, so it will be transmitted via **Space Wave**.

5. **Match with Given Options**:
- Option 1: A - Space wave, B & C - Sky wave (Incorrect)
- Option 2: A - Ground wave, B - Sky wave, C - Space wave (Correct)
- Option 3: B & C - Ground wave, A - Sky wave (Incorrect)
- Option 4: B - Ground wave, A & C - Sky wave (Incorrect)

6. **Conclusion**:
- The correct option is **Option 2**: A is transmitted via Ground Wave, B via Sky Wave, and C via Space Wave.

### Final Answer:
The appropriate mode of communication is **Option 2**: A is transmitted via ground wave, B via sky wave, and C via space wave.

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