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What is ultraviolet (UV) radiation: wavelength, sources and atmospheric filtering

4d ago· 1 min readenNews

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Summary

This article provides a brief, basic overview of ultraviolet (UV) radiation, covering its wavelength range (100–400 nm), its natural (sun) and artificial sources, the three UV bands (UVA, UVB, UVC), and how the atmosphere filters UV radiation — with all UVC and ~90% of UVB absorbed by ozone and other atmospheric gases, while UVA is less affected.

Source

Twitter / XWhat is ultraviolet (UV) radiation: wavelength, sources and atmospheric filteringwho.int

Key quotes

· 4 pulled

Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light.

UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation.

As sunlight passes through the atmosphere, all UVC and approximately 90% of UVB radiation is absorbed by ozone, water vapour, oxygen and carbon dioxide.

UVA radiation is less affected by the atmosphere.

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Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commer

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