Transcript 264-lecture-2015-08-30

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