Modern Physics Lab Reports

Lab reports will generally describe the data acquisition, theoretical development, data analysis, and conclusions for each experiment.

1. Abstract. The abstract very concisely presents the theory, measurement technique, and results with uncertainties for an experiment.

2. Objective and Procedure. Since most of the data acquisition steps are included in the lab write-ups, these steps do not need to be repeated in detail. A sentence on the objective of the experiment and a few sentences and a labeled drawing of the set-up according to the lab manual to describe the equipment used and the data acquisition procedure will usually be sufficient.

3. Theory. The report should address the development of the theory behind the measurements. Drawings may be useful to explain the theory and parameters measured. Much of the theory is included in the write-ups, but I want to make sure you understand the application of the theory to the particular apparatus used in the experiment. How do the measurements made produce the desired quantity?

4. Analysis. Examples of all calculations, the uncertainty calculations, the result, and a comparison of the result with the theoretical prediction constitute the analysis. A well-designed data table (including the raw data) should be included in this section. The use of computers for calculations, graphing, data analysis, data presentation, and drawings is encouraged - once you understand the mathematical techniques used in the calculations.

Data plots should be clearly presented with the axes labeled, units shown, and titles included. Slopes, y-intercepts, and other information derived from the plots should be clearly explained.

5. Conclusions. The conclusion should address the accuracy of the result and whether or not the proposed theory is supported by the result. Reasons for a lack of accuracy should be discussed and evaluated if possible. Suggested improvements or alternative approaches to a measurement can also be made in the conclusions.

Lab reports are due one week after the completion of the data acquisition. While the scientific content will be the major factor in determining the score of a lab report, grammar, significant figures, and timeliness will be considered. Late reports will receive a score reduced by two points per week to a minimum of half credit.

Each student will give an oral presentation concerning one lab activity.

Comments on grammar:

1. Use the past tense in lab reports.

2. The use of "this" without a noun is usually ambiguous.

3. "Data" is a plural noun and requires a plural verb.

4. Avoid contractions in formal writing.