Which of the following is not ionizing radiation

Options

A. Alpha rays
B. Beta rays
C. Infrared rays
D. Gamma rays

Explanation

To determine which of the following is not ionizing radiation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Ionizing vs Non-Ionizing Radiation**:
- Ionizing radiation has enough energy to remove tightly bound electrons from atoms, thus creating ions. Examples include alpha rays, beta rays, and gamma rays.
- Non-ionizing radiation does not have enough energy to remove electrons. Examples include visible light, infrared radiation, and microwaves.

2. **Identify the Given Options**:
- The options provided are:
- Alpha rays
- Beta rays
- Infrared rays
- Gamma rays

3. **Analyze Each Option**:
- **Alpha rays**: These are a type of ionizing radiation. They consist of helium nuclei and have enough energy to ionize atoms.
- **Beta rays**: These are also ionizing radiation. They are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei.
- **Infrared rays**: These are non-ionizing radiation. They do not have enough energy to ionize atoms or molecules.
- **Gamma rays**: These are a form of ionizing radiation. They are high-energy electromagnetic radiation emitted from radioactive decay.

4. **Conclusion**:
- Among the options, the only non-ionizing radiation is **Infrared rays**.

### Final Answer:
The correct answer is **Infrared rays** (option 3).

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