ReviewLecture3b_2014

9mm thus the number of moles of ozone over 1 square

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Unformatted text preview: of •  Ultraviolet A (UVA) wavelength spectrum is 320- 400 nm •  Ultraviolet B (UVB) wavelength spectrum is 280- 320 nm •  Ultraviolet C (UVC) wavelength spectrum is 100- 280 nm Only UVA and UVB ultraviolet rays reach the earth's surface. The earth's atmosphere absorbs UVC wavelengths. Health impact of UVA and UVB exposure: •  UVB rays cause a much greater risk of skin cancer than UVA. •  UVA rays cause aging, wrinkling, and loss of elas=city. •  UVA also increases the damaging effects of UVB, including skin cancer and cataracts. How to Measure Ozone Concentra7on Dobson Unit (DU) is defined to be 0.01 mm thickness at STP (standard temperature and pressure). Pick a surface area A, say over Labrador, CA. Take all the ozone in a column of atmosphere subtended by the a...
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