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Variac and Light Bulb
# 6B40.10

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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