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Unformatted text preview: PHY132 - Lab PHY 132 Laboratory Contents: Logging the Experimental Data Laboratory Report Writing Common Mistakes and How To Avoid Them Systematic and Statistical Errors Propagation of Error Help on using oscilloscopes Measurements 1. Oscilloscope 2. Electric field 3. Capacitors 4. Ohm's law 5. Magnetic force I 6. Magnetic force II 7. Induction 8. LRC circuit 9. Resonance 10. Optics Logging the Experimental Data It is strongly recommended to read the lab note some days before doing the experimentation, and to try to understand the purpose and procedures in advance. Before starting the measurement, talk to your partner and make a plan. Discuss all measurements and input numbers needed towards the final result. Estimate which data inputs are most critical in terms of precision of the final result. You need to LOG carefully all details of the setup, the experimental conditions, and the procedures you followed. Note the time-of-day for the various measurements, and all relevant environmental and experimental information. This is absolutely crucial if you later on want to analyze the data, reconstruct what went awry, or deduct and estimate possible sources of errors. During the lab you should check your data regularly with back-of-the-envelop calculations to see if the results obtained are within expectations, and not wildly off. file:///C|/Documents%20and%20Settings/Linda%20Gra...Brook%20HEP-H2/PHY132%20Sp03/PHY132lab_notes.html (1 of 10) [2/4/2008 3:42:15 PM] PHY132 - Lab Have the TA sign-off on your data in your logbook before leaving the lab. Laboratory Report Writing Follow the basic rule of dividing the report up in concise sections. You do not have to have all of these, but organize your report along these ideas. 1. Title (plus Author, date), 2. Abstract (a 3 sentence summary of results), 3. Experimental Setup (apparatus description and sketch), 4. Data Taking (data tables, procedures, uncertainty estimates, etc.), 5. Data Analysis (calculations and derivations), 6. Result(s) and Discussion (results and significance, comparisons with other results), 7. Summary, 8. Bibliography (all references used). Present your data in tables, but also in GRAPHS. Graphs made manually are perfectly acceptable, but some of you may want to use a spreadsheet program. This allows for sophisticated plots and even for linear or polynomial fits to data sets. Do NOT use a program that you do not understand fully. Be prepared to spend a significant amount of time in learning to use such a program if you haven't before! Discuss the procedure only shortly. Shortly discuss, in your own words, the principle of operation of the setup and/or problems you experienced. Show UNDERSTANDING: Why does the experiment work, what is its underlying physics principle, its function, its goal? Derive the physics formulae used, and/or explain where they come from....
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- Spring '04