What is the wavelength range of UVC light?

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Multiple Choice

What is the wavelength range of UVC light?

Explanation:
Ultraviolet light is split into bands by wavelength, and UVC is the shortest-wavelength portion. UVC comprises wavelengths below 280 nm. That makes 180-280 nm entirely within the UVC region, which is why it’s the best choice. The other ranges lie in UVA (320-400 nm), cross into UVB (280-320 nm), or extend into visible light (400-500 nm). The key idea is that UVC ends at about 280 nm, so anything entirely under that threshold fits as UVC.

Ultraviolet light is split into bands by wavelength, and UVC is the shortest-wavelength portion. UVC comprises wavelengths below 280 nm. That makes 180-280 nm entirely within the UVC region, which is why it’s the best choice. The other ranges lie in UVA (320-400 nm), cross into UVB (280-320 nm), or extend into visible light (400-500 nm). The key idea is that UVC ends at about 280 nm, so anything entirely under that threshold fits as UVC.

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