The most harmful of ultraviolet radiations are

Options

A. UV-A
B. UV-B
C. UU-C
D. All are equally harmful

Answer

To answer the question about which type of ultraviolet radiation is the most harmful, we need to analyze the different types of UV rays and their properties. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Types of Ultraviolet Radiation**:
- There are three main types of ultraviolet (UV) radiation: UVA, UVB, and UVC.

2. **Understand Wavelengths**:
- Ultraviolet rays are categorized based on their wavelengths.
- UVA has the longest wavelength, followed by UVB, and UVC has the shortest wavelength.

3. **Relate Wavelength to Energy**:
- The energy of electromagnetic radiation is inversely proportional to its wavelength. This means that as the wavelength decreases, the energy increases.

4. **Determine the Energy Levels**:
- Since UVC has the shortest wavelength, it has the highest energy among the three types of UV radiation.

5. **Assess the Harmfulness**:
- Higher energy radiation is generally more harmful to biological tissues. Therefore, UVC, having the highest energy, is considered the most harmful of the ultraviolet radiations.

6. **Conclusion**:
- Based on the analysis, the answer to the question is that UVC is the most harmful type of ultraviolet radiation.

### Final Answer:
UVC is the most harmful of ultraviolet radiations.

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