2005B4 (15 points) Your teacher gives you a slide with two closely spaced slits

Question

2005B4 (15 points) Your teacher gives you a slide with two closely spaced slits on it. She also gives you
a laser with a wavelength ? = 632 nm. The laboratory task that you are assigned asks you to determine the
spacing between the slits. These slits are so close together that you cannot measure their spacing with a
typical measuring device.
a. From the list below, select the additional equipment you will need to do your experiment by checking
the line next to each item.

_____Meterstick

_____Large screen

_____Ruler

_____Paper

_____Tape measure

_____Slide holder

_____Light intensity meter

_____Stopwatch
b. Draw a labeled diagram of the experimental setup that you would use. On the diagram, use symbols to
identify carefully what measurements you will need to make.
c. On the axes below, sketch a graph of intensity versus position that would be produced by your setup,
assuming that the slits are very narrow compared to their separation.

d. Outline the procedure that you would use to make the needed measurements, including how you would
use each piece of the additional equipment you checked in a.
e. Using equations, show explicitly how you would use your measurements to calculate the slit spacing.

Explanation / Answer

a) Light intensity meter # send the parts as separate questions

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