UVC wavelengths 0'28

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U V C
U V A
U V B

• UVC wavelengths lt 0.28 ?
• extremely dangerous
• completely absorbed by ozone and oxygen (O2).
• UVB 0.28-0.32 ?
• Partially absorbed by ozone
• particularly effective at damaging DNA
• causes melanoma and other types of skin cancer
• damage to some materials, crops, and marine life
• UVA 0.32-0.4 ?
• not absorbed by ozone
• less damaging than UVB

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