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What type of ultraviolet radiation is known as the burning rays?

  1. UVA

  2. UVC

  3. UVB

  4. UVD

The correct answer is: UVB

UVB rays are known as the burning rays because they have a shorter wavelength and are primarily responsible for causing sunburns. When skin is exposed to UVB radiation, it penetrates the outer layer and can lead to erythema, which is the reddening of the skin due to inflammation. This reaction occurs because UVB rays affect the skin's DNA and can trigger the body's immune response, resulting in sunburn. In addition to causing immediate skin damage, UVB rays play a significant role in the development of skin cancer and contribute to long-term skin damage, including premature aging. Understanding the effects of UVB radiation is crucial for estheticians, as they often need to educate clients about sun protection and the importance of using broad-spectrum sunscreens that protect against both UVA and UVB rays. In contrast, UVC radiation is generally absorbed by the Earth's atmosphere and does not reach the ground, while UVA rays penetrate deeper into the skin and can cause aging and other skin damage, but are not primarily associated with burning. The term "UVD" is not commonly used to refer to a specific type of UV radiation in the context of skin care.