Which one is not a short wave radiation ?

Options

A. UV rays
B. X-rays
C. Radio waves
D. Cosmic rays

Answer

To determine which option is not a short wave radiation, we can follow these steps:

### Step-by-Step Solution:

1. **Define Short Wave Radiation**:
Short wave radiation refers to electromagnetic radiation with wavelengths in the visible spectrum, near ultraviolet (UV), and near-infrared ranges.

2. **Identify the Wavelength Ranges**:
- **UV Rays**: These have shorter wavelengths than visible light and are considered short wave radiation.
- **X-Rays**: These also have shorter wavelengths than visible light and fall into the short wave category.
- **Cosmic Rays**: These have very high energy and short wavelengths, thus also classified as short wave radiation.

3. **Analyze the Options**:
- **Radio Waves**: These have longer wavelengths than infrared radiation and are not considered short wave radiation.
- **Cosmic Rays**: As mentioned, these are high-energy and fall under short wave radiation.
- **X-Rays**: These are also classified as short wave radiation.
- **UV Rays**: These are part of the short wave radiation spectrum.

4. **Conclusion**:
Among the options provided (UV rays, X-rays, radio waves, cosmic rays), the one that is not a short wave radiation is **radio waves**.

### Final Answer:
**Radio waves** are not a short wave radiation.

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