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PIRA Code(s)
6D30.10
Set up time
none
Physics and Science Concepts
Interference
Operation
Shine light through the rings so that they are reflected onto a wall. An overhead is good for this. Turn the screws on the frame to change the interference pattern.
Safety
Over head projector may be obtained from demo 9A36.10.

Light is reflected from a thin film of air between a plane of glass and a spherical glass surface.