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Lecture 10: Basic Postulates of Einstein's Theory of Relativity
September 26, 2017
- Read: Supplementary Reading CH 2
- Study: Boxes on pp. 52--53; Exs 1, 2, 3; Eq 2.3; Ex 4; Eq 2.7.
- (Continuing objective) Relate the concepts of relativity, momentum, and oscillations to “everyday” situations and discuss various applications of the concepts to practical problems in various fields of science, medicine and engineering.
- State the fundamental principles of relativity, and be able to explain how the various aspects of relativity all follow logically from these basic principles.
- Relate measurements of a time interval in two different reference frames using the proper time relation, if one of the observers is at both events.
- Relate length and distance measurements in two different reference frames using length contraction.
- Wednesday's Assigned Problems: A30; Supp CH 2: 1, 2, 5, 6, 7, 8, 10, 12, 13, 14
- Monday's Hand-In Problems: A32; Supp CH 2: 4, 9, 11, 15; Supp CH 3: 2, 3, 5, 9
- Click here for the Lecture overheads
or here for full-sized version.
Answers to conceptests: (1) 5; (2) 4; (3) 2; (4) 3
Videos of example problemsTo see the problem statement, click on the link below. To play the video example, click on the underlined words "Video Demonstration" near the top of the page with the problem statement.
- Video Example #1: Proper time relation and time dilation. ans: 5.7 s
- Video Example #2: More time dilation" and proper time." ans: 20.5 ns
- Video Example #3: Even more proper time. ans: 15.6 ms, 7.5 lt-ms
- Video Example #4: Length contraction. ans: 10.9 m, 43.6 m
- Good Riddance, by Green Day
- Go to Sleep Alone, by Jimmie Dale Gilmore
- Glitter Freeze, by Gorillaz
- Get Lucky, by Daft Punk
- Geronimo, by Sheppard
- Good Grief, by Bastille