A slide has four slits of different widths.
Show the effect of changing slit width.
A rubber tube is used as a model to show how elementary contributions
to the amplitude in the diffraction pattern combine to give maxima
and minima.
A slide has four sets of double slits, using two different slit
widths and two slit separations.
Overlapping transparencies of concentric circles simulate the
interference pattern produced by two slits. Moving one transparency
relative to the other simulates changing the slit separation.
A pair of two-meter sticks are banded with tape to represent
maxima and minima. At one end the sticks are anchored a set
distance apart. At the other end the sticks are placed together
and swept through an arc with "maximas" and "minimas"
alternately reinforcing and cancelling.
Show the pattern produced by multiple (2,3,4,5) parallel slits
and how the pattern changes as the number of slits increases.
Show the many orders produced by a grating.
Use the diffraction pattern produced by a laser beam reflecting
off a ruler to calculate the wavelength of the laser light.
Show the pattern produced by a two dimensional grating (e.g. wire
mesh).
Show the diffraction patterns produced by various optical crystals.
Shows pattern produced by a circular aperture.
A laser beam shining on a ball bearing produces a diffraction
pattern with a clear spot in the center of the ball bearing shadow.
Measure the thickness of a hair by the diffraction pattern it
produces.
A laser beam is reflected off a test tube and an interference
pattern is produced by reflections off the outer and inner test
tube walls.
Show the formation of an image by holography.
A disk with a holographic image is spun. The colors and images
observed vary with the speed of rotation, the applied light, and
the viewer's position.
Use microwaves to show reflection and diffraction.
Show the interference pattern produced by reflection from a soap
film. The pattern evolves as the film changes.
Show Newton's Rings.
Show how interference patterns can be used to test optical surfaces
for flatness.
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