College Physics (大学物理)
Qingxu Li (李清旭) Tel: 62471347, Email: liqx@cqupt.edu.cn Room 306, College of Mathematics and Physics
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"The most incomprehensible thing about the universe is that it is comprehensible."
— Albert Einstein
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College Physics
Textbook
Physics for Scientists and Engineers with Modern Physics (3rd Ed.), by D. C. Giancoli; 滕小瑛改编, 高等教育出版社
Reference Books
Feynman' Lectures on Physics, by R. P. Feynman 物理学, 第五版, 马文蔚改编, 高等教育出版社
Grades
Final Exam (70%) + Performance (30%)
Notes
a. Exercises and Exam are to be finished in English b. Useful materials can be found in the site slxy.cqupt.edu.cn
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Contents to be Discussed
Classical /Newtonian Mechanics (28 Periods) Wave/Physical Optics (20 Periods) Electromagnetism Introduction to Modern Physics Relativity, Quantum Physics, etc.
(Chp. 15-19, 23-24, 36-40 will not be discussed in the course)
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The Nature of Sciences (Physics)
Observations Explanations Verifications Experiments Theories
Testing
Up to date: A theory cannot be absolutely verified!
Three ways to unknown: Expt., Theor., Comput.
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Models and Theories (模型和理论)
Model
A model is an analogy or mental image of the phenomena in terms of something we are familiar with. A model gives us an approximate mental or visual image for what actually is happening. In simple, a model is a simplified substitute for the real problem that allow us to solve the problem in a relatively simple way. A theory is broader and more detailed than a model, and it attempts to solve a set of problems with great precision. Models often lead to important theories. It is important to tell the differences between the models or theories and the real systems or the phenomena themselves.
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Physical Laws (物理定律)
Laws or physical laws are concise but general statements about how nature behaves, and sometimes the statement takes the form of a relationship or equation between quantities. Scientific laws are descriptive: they do NOT say How nature should behave, but rather are meant to describe how nature does behave. Laws are also can not be tested in the infinite variety of cases.

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