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Description: A large light bulb is plugged into a variac. Slowly turn up the variac and observe the changing color of the filament. Student diffraction gratings are available. Setup Time: 5 min Quant. in Demo Room: 1 Demo References Sutton L-99 Vary the voltage across a clear glass lamp from zero to 50% overvoltage. Also measure the intensity and plot against power.
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