DESCRIPTION
A pair of microscope slides have been
taped together, trapping a thin film of air between them. View
reflection
of white or sodium light in the slides against a dark background.
The
light
reflecting off the two inner air-glass interfaces produces an
interference
pattern. Flex or squeeze the slides to change the thickness of
the air
film and move the pattern.
NOTES
There are seven pairs of slides to pass
around to students.
To make more slide pairs, use brand
new
or really clean microscope slides. For a more uniform air wedge,
place
a piece of paper between the slides on one end.
