Whose experiment worked the beginning of the field of communication using electromagnetic waves ?

Options

A. Hertz
B. Marconi
C. Jagdihs Chandra Bose
D. Michelson and Morley

Answer

To determine whose experiment marked the beginning of the field of communication using electromagnetic waves, we can analyze the contributions of the individuals listed in the options.

### Step-by-Step Solution:

1. **Understanding Electromagnetic Waves**:
- Electromagnetic waves are described by Maxwell's equations, which show that the electric field (E) and magnetic field (B) are perpendicular to each other and propagate through space.

2. **Identifying Key Contributors**:
- **Hertz**: Heinrich Hertz was the first to conclusively prove the existence of electromagnetic waves in the late 19th century. His experiments demonstrated the transmission and reception of radio waves.
- **Marconi**: Guglielmo Marconi is credited with developing the first practical system of wireless communication. He successfully transmitted radio signals over long distances, which laid the groundwork for modern communication systems.
- **Jagdish Chandra Bose**: He conducted early experiments in radio waves and was a pioneer in the field, but his work was more focused on the scientific aspects rather than communication.
- **Michelson and Morley**: They are known for their famous experiment that attempted to detect the presence of the "aether" but did not contribute directly to communication using electromagnetic waves.

3. **Conclusion**:
- While Hertz was instrumental in proving the existence of electromagnetic waves, it was Marconi who applied this knowledge to create a communication system. Therefore, Marconi's experiments are recognized as the beginning of the field of communication using electromagnetic waves.

### Final Answer:
The correct answer is **Marconi** (Option 2).

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