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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? Lets 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 = = If the laws of physics are the same in all inertial frames then and 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 Galileos 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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