Hertz's expriment confirm that

Options

A. An electron ar rest produced EM waves
B. An oscillating electron produced EM waves
C. An electron in conductor moving with drift velocity produces EM waves
D. All of these

Answer

To solve the question regarding Hertz's experiment and what it confirms, we can break it down step by step.

### Step-by-Step Solution:

1. **Understanding Hertz's Experiment**: Heinrich Hertz conducted experiments in the late 19th century that demonstrated the existence of electromagnetic waves. He generated and detected these waves using an apparatus that involved oscillating electric charges.

2. **Identifying the Role of Electrons**: In Hertz's experiment, the key component was the oscillation of electrons. When electrons are accelerated (for example, by an alternating current), they can produce electromagnetic waves.

3. **Analyzing the Options**:
- **Option 1**: An electron at rest produces electromagnetic waves. This is incorrect because stationary electrons do not emit electromagnetic radiation.
- **Option 2**: An oscillating electron produces electromagnetic waves. This is correct, as Hertz's experiment showed that oscillating charges create electromagnetic radiation.
- **Option 3**: An electron in a conductor moving with drift velocity produces electromagnetic waves. This is misleading; while moving electrons can contribute to current, they do not produce electromagnetic waves in the same way that oscillating electrons do.
- **Option 4**: All of these. Since options 1 and 3 are incorrect, this option is also incorrect.

4. **Conclusion**: The correct answer is that Hertz's experiment confirms that an oscillating electron produces electromagnetic waves.

### Final Answer:
The correct option is **Option 2: An oscillating electron produces electromagnetic waves**.

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