Unformatted text preview: o Does light travel instantaneously? • Water moves more slowly - you can watch them • Sound waves are faster, but still not instant - thunder and lightning o Galileo and Newton both wanted to know this • Romer found the answer from the moons of Jupiter • Eclipses of moons are early when Jupiter is close and late when it is far away • Romer measured about 186,000 miles/second - still very fast • Modern experiments give 299,792,458 m/s • You can assume 3.0 x 10^8 m/s for this course 6. The Spectrum of "Light" o Electromagnetic spectrum 7. Kirchhoff's Laws o Law 1 • Hot opaque body (including gas) produces continuous spectrum o Law 2 • Hot transparent gas produces emission lines spectrum...
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This note was uploaded on 03/30/2012 for the course ASTR 1102 taught by Professor Staff during the Spring '08 term at LSU.
- Spring '08