This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Physics 331A Lab Practices & Notebooks Lab Practices, Precautions, Notebooks and Reports Precautions • No food or drink are permitted in the lab. • DO NOT LOOK DIRECTLY INTO ANY LASER BEAM OR ANY SPECULAR RE- FLECTION OF A LASER BEAM . The lasers in the lab put out 2 mW, more than needed for permanent eye damage. • DO NOT touch mirror surfaces, or any optical surface. If a component is dirty, please consult the Lab Manager. • In the diffraction experiment (Exp. 5) do not focus the unattenuated (i.e., not dimmed with a polarizer) laser light to a point on the linear array. Focus the beam on an index card in place of the array, then remove the card after dimming the beam. • Use special care with the spatial filter pinholes (1-d diffraction experiments use these). • The curtains around each lab station can easily be pulled out of their tracks. To avoid this, gather the curtain in small bunches and pull a small portion of the curtain at any one time • Avoid leaning on optical tables. • Mirrors, lenses should be covered when experiments are finished. When in doubt, ASK FOR IN- STRUCTIONS. Laboratory Work Sign in and out on sheets provided with each experiment. Indicate any problems with the equipment so that it can be repaired promptly for use by the next group. Suggestion: While in lab, visit the set-up for your choice of next week’s experiment. That will help you understand the experiment instructions and get started quickly. Notebooks There are no formal reports in the usual sense. Experiment write-ups will be in the form of lab notebooks. There is a strict format for notebooks. You should obtain the following materials: • Two cardboard “expansion report” covers. These are cardboard covers that allow hole-punched papers to be assembled into a bound notebook. An example purchased at the University Bookstore is the Oxford Esselte model 12905 ($1.95). You will need two of these covers because you will need to be able to use one of the notebooks while the other is being graded. • One (or more) pad(s) of green or tan “engineering” paper. This is the paper that has graph ruling on the back side of each sheet. The same type of paper is used in the electronics labs (physics 334). • A package of “insertable notebook dividers”. These are the notebook dividers that have the clear plastic tabs you can slip a label into. Your reports will consist of the notes and drawings you make in lab (on the engineering paper), computer, plotter, or oscilloscope printouts (depending on the lab), and typed written material (to be described below) assembled into the report covers. Each lab report should be separated by one of the notebook dividers....
View Full Document
- Fall '11
- Physics, systematic error, Lab Practices