Lecture 2 of 7 in the principles of energy balance in environmental systems lecture series. Lecture covers: 1. Key for homework: units conversion Calories v. calories 2. Calculating the efficiency of photosynthesis 3. Calculating absorbed shortwave radiation – importance of albedo 4. The three components of shortwave radiation 5. Definitions of shortwave and longwave radiation 6. The Stefan-Boltzman Law for longwave radiation All lectures and handouts can be found at http://www.apogeeinstruments.com/Principles-of-Energy-Balance-in-Environmental-Systems-Lectures/.