Modern
Physics > Quantum Effects > Blackbody Radiation
DCS#
6B40.10
VARIAC AND LIGHT
BULB
APPARATUS
showcase bulb
202-21-B
socket and variac
202-21-B
set of diffraction gratings
202-21-E5
DESCRIPTION
Distribute diffraction gratings to
students.
Turn up voltage to bulb to show increasing intensity of blue end of
spectrum
with increasing temperature of filament.
NOTES
One can use blue and red filters
(202-21-E4) to show that the change in intensity is not the same for
each color.