UVB radiation

physics

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Last updated

July 14, 2026

Quick Summary

UVB radiation is a portion of the ultraviolet radiation spectrum, specifically ranging from about 280 to 315 nanometres (nm) in wavelength. This type of radiation is invisible to the human eye but is known for its significant effects on biological organisms.12

Key characteristics of UVB radiation include:
* Source: Primarily produced by the Sun.1
* Atmospheric Interaction: While much of the Sun's ultraviolet radiation is absorbed by the ozone layer, UVB can still reach Earth's surface.1
* Biological Effects: UVB is primarily responsible for sunburn, skin aging, and the development of skin cancer in humans. It can also harm marine life, such as plankton.12
* Penetration: Unlike X-rays, UVB has limited penetration, mainly affecting the surface layers of the skin.1

Despite its harmful effects, UVB radiation also plays a role in stimulating the production of vitamin D in the skin.1

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ultraviolet radiation
…nm), also called black light; UVB (315–280 nm), responsible for the radiation’s best-known effects on organisms; and UVC (280–100 nm), which does not reach Earth’s surface.
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…nm), also called black light; UVB (315–280 nm), responsible for the radiation’s best-known effects on organisms; and UVC (280–100 nm), which does not reach Earth’s surface.
Read More