Question

1. As long as the distance to the wall is much greater than the separation of the slits, the spacing between the bright spots is uniform. Using data from the Double Slit Experiment Data table, compute the distance between two bright spots.

3. How close together were you able to make your slits?  In other words, calculate the quantity d in the relation y = L/d .  Show all of your work.

4. If you were to use a green light instead of a red light, how would that change the pattern?

5. The same effect is not observed when white light from a light bulb is used. Explain why white light doesn’t produce a fringe patter

6. A diffraction grating is like a double slit except it contains a large number of equally parallel slits. What would you predict the differences would be in the pattern seen on the wall?

Double Slit Experiment Data
Wavelength (nm)	650 nm
Distance from foil to wall (m)	1.5 m
Number of bright spots	10
Distance between first and last bright spot (m)	0.10m

Answer 1