Lecture9 - PHY102 1 Major Concepts in Physics Lecture 9....

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Unformatted text preview: PHY102 1 Major Concepts in Physics Lecture 9. Prof Simon Catterall Office 309 Physics, x 5978 smc@physics.syr.edu http://physics/courses/PHY102.08Spring PHY102 Plan for today Few words about exam Homework 2 due in workshop this week. Homework 3 goes out Recap discussion of thermal radiation and line spectra Demo using diffraction grating Colors and color mixing PHY102 Exam 1 - summary Generally good. Mean score 36/44=81% B- 40/44=91% A- 27/44=61% C- PHY102 Recap blackbody radiation All objects above absolute zero give off thermal radiation. Occurs because all objects contain moving charges EM radiation. Many examples Sun, people, light bulbs, electric heaters .. Idealized body which is most efficient at this process is called a blackbody PHY102 Cosmic Microwave Background Remnant of Big Bang As Universe cools Bathed in thermal Radiation whose current Temperature corresponds To microwaves PHY102 Stefans law Good emitters...
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This note was uploaded on 05/18/2008 for the course PHY 102 taught by Professor Simoncatterall during the Spring '08 term at Syracuse.

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Lecture9 - PHY102 1 Major Concepts in Physics Lecture 9....

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