class03 - Announcements • No class on Monday(MLK Jr day...

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Unformatted text preview: Announcements • No class on Monday (MLK, Jr. day) • Reading for Wednesday: TZD 1.9 • Homework #1 is posted; due at beginning of class on Friday next week of class on Friday next week. • First midterm is on Tuesday, February 9, 7:30pm-9:15pm. Contact me immediately if you cannot make this date! Need special accommodations? See me! Quiz on reading (closed book, no talking) The Michelson-Morley Experiment tests if the speed of light in all inertial frames… A – …is the same in air and in vacuum Q1 B – …is not the same in air and in vacuum C – …is the same in all directions D – …does not depend on the wavelength E – …does not depend on the color Reading for next class (Wednesday): 1.9 Today • Is there an ether? Let’s find out! • Interferometers Light: the ultimate yardstick. Remember this from last class? From PHYS 1120 you might recall that Mr. Maxwell told us the speed of light ‘ c ’ is: s m c / 10 00 . 3 1 8 × = = μ ε If the laws of physics are the same in all inertial frames then ε and μ have to be Mr. Galileo told us that c’ = c - v the same in all inertial frames. Then we made up the “luminiferous ether” to fix Galileo’s velocity transformation law (u’ = u - v) Now we have to check if there is a luminiferous ether ! How?? Michelson and Morley… …performed a famous *) experiment that effectively measured the speed of measured the speed of light in different directions with respect to the “ ether wind. ” *) some say, the most successful failure… Frame of reference v ‘Ether’ Observer on the sun:-v-v Ether ‘viewed’ in the laboratory on the earth: Ether in the laboratory frame...
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This note was uploaded on 08/24/2010 for the course PHYS 2130 taught by Professor Staff during the Spring '08 term at Colorado.

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class03 - Announcements • No class on Monday(MLK Jr day...

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