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Unformatted text preview: ISP209s8 Lecture 61 Today • Announcements: – HW#3 is due tomorrow, Wednesday Jan 30 th at 8 am. – Look for the next two extra credit problems starting tomorrow – HW#4 will be due next Wednesday, Feb 6th • Vectors • Special Relativity ISP209s8 Lecture 62 Vector Addition and Subtraction Addition Subtraction ISP209s8 Lecture 63 Example of the use of vectors Velocity of stream Rowing velocity River Actual Velocity River Actual Velocity ISP209s8 Lecture 64 How long to cross the river? Velocity of stream Rowing velocity River ACROSS speed rowing river the across distance time = The rowing speed ACROSS is the magnitude of the boat’s velocity directed toward the opposite bank. ISP209s8 Lecture 65 Vectors You are here. You want to be here. river D Total r+D river K Total r+K ISP209s8 Lecture 66 Albert Einstein • Poor high school student – did not talk till age 5 • Patent clerk in 1905 • In 1905 published three papers that changed scientific thought – Special relativity (moving clocks run slow) – Quantization of light (foundation of quantum mechanics) – Brownian motion (foundation of statistical physics) • Was able to do this, in part, by asking simple questions • Train story… ISP209s8 Lecture 67 The principle of relativity Every nonaccelerated observer observes the same laws of nature. In other words, no experimental performed within a sealed room moving at an unchanging speed and direction can tell you whether you are standing still or moving. ISP209s8 Lecture 68 A consequence – speed of light flashlight Albert What is the speed Albert measures for light?...
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This note was uploaded on 07/25/2008 for the course ISP 209 taught by Professor Sherrill during the Spring '07 term at Michigan State University.
 Spring '07
 Sherrill

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