Physics 264L Professor Henry Greenside Monday 2015-08-30 Names of Students Install Socrative app on your cellphone http://www.socrative.com/ Polling Question One arcsecond 1’’ is A. a unit of time B. one degree C. 1/60 of one degree D. 1/3600 of one degree E. a smaller angle Bradley’s Stellar Aberration Data Polling Question As a photon from a remote star approaches the Sun, the photon’s speed v A. stays constant B. increases C. decreases Polling Question As a photon with frequency f from a remote star approaches the Sun, it frequency f A. stays constant B. increases C. decreases Polling Question A point object with mass m is attached to an ideal spring with spring constant k, and the mass moves back and forth with amplitude A on a frictionless horizontal surface. If T1 is the period of the motion according to Newtonian mechanics and T2 is the period of the motion according to special relativity then A. T1 = T2 B. T1 > T2 C. T1 < T2 Polling Question If a point particle with mass m moves with speed v with respect to some observer, then the kinetic energy KE of that particle is given by (1/2) m(v) v2 = (1/2) m0 g v2. True False Polling Question A rigid vertical rod of length L=1 m has a sound emitter with frequency f on the bottom and a microphone at the top. If the rod is dropped from the top of the Duke chapel, the microphone will measure a frequency f’ that is A. = f B. > f C. < f Michelson-Morley Interferometer LIGO Gravity Wave Detector Based on Interferometry