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| 1984年CUSPEA试题(三)(英文) | |
| 摘 要： | Solve 5 of the following 6 problems.C1. (a ) Consider the emission or absorption of visible light by the molecules of a hotgas. Derive an expression for the frequency distribution F(v) expected for aspectral line of central frequency v0 due to the Doppler broadening. Assume an ideal gas at temperature T with molecular weight M.Consider a vessel filled with argon gas at a. pressure of 10 Torr (1 Torr=l mm of mercury) and a temperature of 2000℃. Inside the vessel is a smallpiece of sodium w… |
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