Equipment List:
Pasco wave optics kit with lasers.
Pasco optics bench
Two meter sticks
Masking tape
Procedure:
Find the two double slit slides in your kit. One
slide has four pairs of slits (labelled A, B, C, D). With this slide, use
pair A.
The other slide has two slits, then three slits, then four slits and
so on. For this slide, only use the two slits. Consult your
instructor if you wish to experiment with the other slits. Put the one
of the slides in front of the laser on a lens holder attached to the bench.
Construct a screen in a similar matter as done in the previous lab. Shine
your laser against the side of the room. Find the interfence pattern and
tape a piece of white paper to the wall with masking tape. Point the laser
away from other people in the room.
Do not allow the possibility of the laser light going into anyone's eyes including from a reflection.
By taking the relevant data in a proper experimental matter (consult
your instructor) and using the given wavelength for the laser light (632.8
nm), calculate the separation distance between the slits and its uncertainty.
Repeat for the pair of slits on the other slide. Compare with the given
values printed on the two slides. Your discrepancy test value should be
less than ten percent or you may be making a mistake.