Lab report



Use and choose Slits

PART 1: Slits- Single Slit Design an experiment to verify the that for small angles the angular spread is inversely proportional to the ratio of a/入, and collect data 

 HINT:  if LaTeX: w\propto\frac{1}{a}w∝1a then LaTeX: wa=constwa=const if you graph LaTeX: aw\:versus\:aawversusa. Use your graph to find LaTeX: \lambda 

PART 2: Diffraction

• Explain how the aperture geometry relates to the diffraction pattern.
• Predict how changing the wavelength or aperture size affects the diffraction pattern.

strictly follow  

10 steps to design an experiment and conduct it:

1. The purpose of the lab (can be finding more than one thing, for example wavelength of the source, the position of the 1st bright band,  the intensity of the central bright band or something else. It has to be something that you can calculate theoretically, or you know the actual value, so you can compare your experimental results with. May be you can start with the theory)

2. It is useful to identify what quantities can be changed, what quantities can be measured. 

3. in your experiment you need to do several trial for measurements for accuracy.

4. When conducting the experiment, you can only change one quantity at a time.

5. make a table to help yourself to collect data and collect data

6. Present data (tables or graphs)

7. Analyze the data  (includes calculations of experimental values and theoretical values, error calculations)

8. Discuss your analysis, your data and your errors

9. Make a Conclusion

10.  Report everything in a formal lab report format

and write 4 pages to 4 half pages lab report

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