L05-Energy-and-Radiation

L05-Energy-and-Radiation - Natural Environments: The...

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Outline Further Reading: Chapter 04 of the text book - matter and energy - radiation laws - solar and terrestrial radiation Natural Environments: The Atmosphere GE 101 – Spring 2011 Boston University Myneni Lecture 05: Energy and Radiation Jan-31-11 (1 of 9)
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Natural Environments: The Atmosphere GE 101 – Spring 2011 Boston University Myneni Lecture 05: Energy and Radiation Jan-31-11 (2 of 9) Previously, we discussed how the orbit of the earth around the sun and the tilt of its axis of revolution affects how much solar energy hits a certain point on the surface Now we want to discuss what this energy does once it reaches the earth: Need to understand how energy interacts with matter So, what is matter? And, what is energy? Introduction
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What is Matter?
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Natural Environments: The Atmosphere GE 101 – Spring 2011 Boston University Myneni Lecture 05: Energy and Radiation Jan-31-11 (3 of 9) Matter Substance that occupies space and has mass Composed of atoms and molecules Gas: Atoms/molecules are spread very far apart Exhibit random motion relative to their neighbors Gases expand and compress easily Liquid: Atoms/molecules exhibit random motion relative to their neighbors Interactions with one another Liquids do not expand and compress easily: allows the travel of waves Maintains a closed surface even without a container
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L05-Energy-and-Radiation - Natural Environments: The...

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