The apparatus consists of a
long-focal-length convex lens pressed against a flat glass
plate. The reflections off the two inner air-glass interfaces produce a circular
interference pattern. Illuminate with monochromatic
light to show that the ring diameters depend on the wavelength
of the light.
NOTES
Place the Newton's rings
apparatus on the document camera on a dark background and
illuminate it with diffuse light, either from the overhead
lights or the document camera lamp with a diffuser.
Adjust the document camera iris.
