The basic source of electromagnetic radiation is an accelerated :

Options

A. charge
B. magnet
C. light
D. `alpha-` particle

Answer

To solve the question "The basic source of electromagnetic radiation is an accelerated:", we need to analyze the options provided and understand the fundamental concepts of electromagnetic radiation.

### Step-by-Step Solution:

1. **Understanding Electromagnetic Radiation**:
Electromagnetic radiation is produced by the movement of charged particles. This includes the generation of electric and magnetic fields.

2. **Identifying the Source**:
The question asks for the basic source of electromagnetic radiation. The key term here is "accelerated." Only charged particles can produce electromagnetic radiation when they are accelerated.

3. **Evaluating the Options**:
- **Light**: Light itself is not a source; it is a form of electromagnetic radiation. Therefore, this option does not apply.
- **Alpha Particles**: While alpha particles are charged, they are massive and not commonly considered a basic source for generating electromagnetic radiation in general contexts.
- **Charge**: Accelerating a charge (like an electron) is a fundamental way to produce electromagnetic radiation. When a charged particle accelerates, it creates changing electric and magnetic fields, which propagate as electromagnetic waves.

4. **Conclusion**:
The basic source of electromagnetic radiation is an accelerated **charge**.

### Final Answer:
The basic source of electromagnetic radiation is an accelerated **charge**.

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