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What is present all year and more prevalent than UVB?

User Kimm
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1 Answer

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Final answer:

UV-B rays, with wavelengths of 290-320 nm, account for 95% of solar UV radiation reaching Earth's surface. They are more prevalent than UV-A and contribute to skin cancer through indirect DNA damage.

Step-by-step explanation:

The ultraviolet (UV) light that penetrates our skin is made up of two types of radiation: UV-A rays and UV-B rays. UV-B rays, with wavelengths of 290-320 nm, account for 95% of solar UV radiation reaching Earth's surface. UV-B radiation is more prevalent than UV-A and is responsible for causing skin cancer through indirect DNA damage.

User Derwyn
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