Physics 221Physics 221Spring 2012
Note: The exam dates for the three exams were incorrect on theexams were incorrect on the presentation and syllabus distributed earlier.earlier. Exam I will be Thursday February 23. Exam II will be Thursday March 29Exam II will be Thursday March 29. Exam III will be Thursday April 26.
January 19, 2012 Physics 221 1
Light and Optics
Jan. 17 – 20 33 The Nature and Propagation of LightJan. 23 – 27 34 Geometric OpticsJan 30 Feb 3 35 InterferenceJan. 30 – Feb. 3 35 InterferenceFeb. 13 – 17 36 Interference / DiffractionFeb. 20 – 24 36 DiffractionThursday, February 23 33-36 Exam I
January 19, 2012 Physics 221 2
Oscillations and Waves
Feb. 27 – Mar. 2 13 Periodic MotionMar. 5 – 9 15 Mechanical WavesMar 12 16 Spring BreakMar. 12 – 16 Spring BreakMar. 19 – 23 16 Sound and HearingMar. 26 – 30 16 Doppler EffectThursday, March 29 13, 15-16 Exam II
January 19, 2012 Physics 221 3
Thermal Physics
Apr. 2 – 6 17 Temperature and HeatApr. 9 – 13 18 Thermal Properties of MatterApr 16 20 19 The First Law of ThermodynamicsApr. 16 – 20 19 The First Law of ThermodynamicsApr. 23 – 27 20 The Second Law of ThermodynamicsThursday, April 26 17-20 Exam III
January 19, 2012 Physics 221 4
The Nature and Propagation p gof Light (continued)(continued)
Chapter 33January 19, 2012January 19, 2012
January 19, 2012 Physics 221 5
T t l I t l R fl tiTotal Internal Reflection
Going from an optically more “dense” medium
The “critical angle” is defined as the angle when TIR begins.
to a less “dense” medium.N2 < N1
January 19, 2012 Physics 221 15
Principle behind optical fibers
Inside higher index of refraction
Outside lower index of refraction
January 19, 2012 Physics 221 16
Outside lower index of refraction (usually there are multiple coatings around fiber to insure this).
Polarization of lightPolarization of light
The polarization direction for light is the direction of the Electric field vector in the EM wave.vector in the EM wave.
January 19, 2012 Physics 221 18