Lec4_Stratospheric_Ozone-2

Lec4_Stratospheric_Ozone-2 - Lecture 4 Stratospheric...

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Unformatted text preview: Lecture 4 Stratospheric Ozone-2: Physics and Chemistry of the Ozone Layer CHEM/ENVS 380 Feb 4, 2010 1. Become familiar with major regions of the electromagnetic spectrum. 2. Understand the relationship between energy and wavelength of light. 3. What wavelengths of light do O 2 and O 3 absorb? What are the consequences? 4. What portion of the incoming solar radiation reaches the Earths surface, and why? The Electromagnetic Spectrum Baird and Cann (2008), Figure 1-6. Light has wave- like and particle- like properties Photon = finite packet of light that is absorbed or emitted by a molecule Energy E of a photon is inversely related to wavelength http://praxis.pha.jhu.edu/science/emspec.html (Adapted from W. J. Kaufmann, "Universe", [Freeman:New York].) Relationship Between E and 2200 = wavelength (nm, or 10-9 m) h = Plancks constant (6.63 x 10-34 J s) c = speed of light (3.00 x 10 8 m s-1 ) E is commonly expressed as:...
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Lec4_Stratospheric_Ozone-2 - Lecture 4 Stratospheric...

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