Black Body Radiation Spectra

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Black Body Radiation Spectra with Replica Grating Slides

PIRA 7A05.10

The replica grating slides shown at right can be passed out to a large lecture class. Students can observe the shift in radiated frequency of an incandescent light bulb filament with temperature. Connect a clear incandescent light bulb to a Variac, as shown at left, to vary brightness and thus filament temperature.