What type of ultraviolet radiation is characterized by shorter wavelengths and is known for causing skin burning?

• A. UVA radiation
• B. UVB radiation
• C. UVC radiation
• D. HEV radiation

Answer: (B)

UVB radiation is characterized by shorter wavelengths compared to UVA radiation, and it is primarily responsible for causing skin burning. This type of ultraviolet radiation penetrates the epidermis and can directly damage the DNA in skin cells, leading to sunburn, skin aging, and an increased risk of skin cancer. The shorter wavelength of UVB rays means they have more energy and are more intense at causing immediate damage to the skin, which is why protection against UVB exposure is critical, particularly during peak sun hours.

UVA radiation penetrates deeper into the skin but is less associated with immediate burning effects; rather, it contributes to long-term skin damage and aging. UVC radiation, while harmful, is mostly absorbed by the Earth's atmosphere and does not typically reach the surface, making it less relevant to everyday sun exposure. HEV radiation, which stands for high energy visible light, refers to blue light and is usually associated with other skin effects, rather than burning. Since the question specifically addresses burning, UVB is the pertinent type of ultraviolet radiation.