BMC Pre Lab and Evaluation

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BMC Pre Lab and Evaluation


Student's name ______________________________________________________________


Partner's Name ______________________________________________________________


Pre-lab Discussion Questions

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:


  1. What are the masses of the various nanoparticles you will be observing in the lab? How many atoms are in a single particle? What is the uncertainty in these numbers? Data sheets for the nanoparticles are available on the BMC Reprint List.
  2. Using the microscope, you will observe a minimum of two different size particles in at least four different viscosity solvents. Choose the conditions you plan to observe and simulate them in Matlab. (You should choose at least one particle 1 μm or larger and one smaller.)
  3. Use your simulated data to calculate the diffusion coefficient, D in each case. Explain how you arrived at your answer.
  4. What is the uncertainty of your estimate of D? How does it vary with the number of simulated data points? Explain your strategy for making observations in the lab. What additional sources of error (these are significant) will come in to play? How will you account for them?

Keep these scripts. When analyzing your data you can create artificial data sets on which to test your analysis techniques.


Staff Signature ______________________________________________ Date ____________

Completed on the first day of lab? (circle) Yes / No

Mid-lab Questions Part I

  1. Using a slide with a combination of 10μm and 0.44μm polystyrene spheres, show how to set up Köhler illumination.
  2. How many nanometers per pixel are captured at 10x, 20x, and 40x?
  3. Draw diagram of darkfield illumination. Explain how it is possible to see 40 nm objects with visible light (400-750 nm wavelengths).
  4. Set up dark-field illumination.


Staff Signature ______________________________________________ Date ____________

Completed by the second day of lab? (circle) Yes / No


Mid-lab Questions Part II

  1. By day three of this lab, you should have collected some particle tracks and made several movies. Show one of the particle tracks to an instructor. What value of D did you calculate from the track? How close is this to the theoretical value? You can do this either with the BMC application or with the Matlab scripts.
  2. Show and explain your averaging and centroiding code. How do they work?


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

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