Most harmful radiation is

Options

A. UV-A
B. VU-B
C. UV-C
D. all are equally harmfull

Answer

**Step-by-Step Solution:**

1. **Identify Types of UV Radiation**: The question pertains to UV radiation, which is categorized into three types: UVA, UVB, and UVC.

2. **Understand the Harmfulness of Each Type**:
- **UVA**: This type of radiation penetrates the skin more deeply and is associated with skin aging and long-term skin damage.
- **UVB**: This radiation is responsible for causing sunburn and is more intense than UVA. It is also known to damage DNA and can lead to skin cancer.
- **UVC**: This type is the most harmful but is mostly absorbed by the ozone layer and does not reach the Earth's surface.

3. **Role of the Ozone Layer**: The ozone layer, located in the stratosphere, protects living organisms from harmful UV radiation by absorbing most of the UVC and some UVB radiation.

4. **Effects of UV Radiation**: UV radiation can cause mutations in DNA, leading to various health issues, including skin cancer. UVB radiation is particularly noted for causing damage to the skin and eyes, including conditions like snow blindness.

5. **Conclusion**: Based on the information, UVB radiation is identified as the most harmful type of UV radiation that reaches the Earth's surface, causing significant damage to living organisms.

6. **Final Answer**: The most harmful radiation is UVB radiation.

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