OPTICS - GEOMETRICAL OPTICS - REFRACTIVE INDEX	Order
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Description: A laser beam passes over a sheet of aluminum that has been heated with a bunsen burner. When the heat is on, the laser image can be seen 'jumping' around. After you turn the heat off, the image still moves around, but move the plate with a pair of plyers and the beam movement ceases. Return the plate and the movement also returns. Hazards: Plate remains hot for a while after the demonstration is complete. Place the hot plat where it will not be touched by your students or you. Purchased/Built: built Setup Time: 1 day Quant. in Demo Room: 1 Demo References The American Journal of Physics AJP 57(10),953 A laser beam passing through a tank of water begins to deflect immediately when heat lamps are turned on. Images are also observed. The American Journal of Physics AJP 37(3),332 A laser beam is imaged through a keyhole and the beam then passes through a 1 meter oven. The American Journal of Physics AJP 51(5),475 An apparatus for cooling a plate to deflect a laser beam downward. The American Journal of Physics AJP 51(3),270 A laser beam almost grazing a hot plate will show deflection when the hot plate is turned on.
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