HOL Pre Lab and Evaluation
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HOL Pre Lab and Evaluation
Student's name ______________________________________________________________
Partner's Name ______________________________________________________________
Before The Lab
Pre-Lab Discussion Questions and Sign Off Sheet
It is your responsibility to discuss this lab with an instructor before your first day of your scheduled lab period. This signed sheet must be included as the first page of your report. Without it you will lose grade points. You should be prepared to discuss at least the following before you come to lab:
- What is a hologram? Students often respond that a hologram preserves 3-D information while a regular picture only contains 2-D information. That statement is too vague. Specifically, what “extra” information is contained in the diffraction pattern that makes up a hologram? How is it encoded? For example, what does the diffraction pattern caused by a plane wave (the reference beam) interfering with light from a point source (a simplified object) look like? See figure. How does this pattern change as the point source changes position (x, y, z)?
- How does the Michelson interferometer work? In the interferometer shown, the lengths L1 and L2 are different. What is the path difference between the light waves that are sent along the two arms when they recombine at the screen?
- Concerning the laser: a. The coherence length is a characteristic length of the wave trains emitted by the laser. Physically, what does this length tell us about the light from the laser? Why is this an important number to know? How might you measure it? b. The laser light is very bright or intense, with a diode laser power of 45 mW in a collimated beam. Compare this to the power of the sun at the earth’s surface (check the CRC Handbook. The solar constant is 2 calories/cm2/minute). How do the spectral powers compare (power/wavelength interval)?
- What are the safety requirements for working with this Laser?
Staff Signature ______________________________________________ Date ____________
Completed on the first day of lab? (circle) Yes / No
Mid-lab Questions
On day 3 of this lab, you should have measured the stability of the laser and successfully produced a transmission hologram. Show them to an instructor and ask for a signature.
Staff Signature ______________________________________________ Date ____________
Completed by the third day of lab? (circle) Yes / No
INCLUDE THIS SHEET AS THE FIRST PAGE OF YOUR REPORT
Physics 111 Advanced Lab Student Evaluation of Experiment
Now that you have completed this experiment, we would appreciate your comments. Please take a few moments to answer the questions below, and feel free to add any other comments. Since you have just finished the experiment it is your critique that will be the most helpful. Your thoughts and suggestions will help to change the lab and improve the experiments. Please be as specific as possible, using both sides of the paper as needed, and turn this in with your report. Thank you!
Experiment name:____________________________________________ Date: ________________________
How was the write-up for this experiment? How could it be improved?
How easily did you get started with the experiment? What sources of information were most/least helpful in getting started? Were the reprints appropriate? Did the Pre-lab discussion help? Did you need to go outside the course materials for assistance? What additional materials could you have used?
What did you like and/or dislike about the experiment?
Did you like the WIKI or does it need improvement? How?
Would you recommend this lab to fellow student? Why or why not?
What advice would you give to a friend just starting this experiment?
Did you get this write up from the 111-Lab WEB site or a copy. ____________________________
How would you rate the Physics 111- Lab WEB sites? (1 = poor; 5 = good.)
1 2 3 4 5
Comments:
| Please circle the abbreviations of the other labs you have done. | Overall quality of this experiment? | ||||||||||
| ATM | BMC | BRA | COM | CO2 | GMA | HAL | 1 2 3 4 5 | ||||
| HOL | JOS | LIF | LLS | MNO | MOT | MUO | Poor Average Good | ||||
| NMR | NLD | OPT | OTZ | RUT | SHE | XRA | |||||
Thank you from the 111-Lab Staff
