Objective: Verify that intensity of radiation is proportional to the fourth power of the temperature, T4
The way that intensity of radiation from a black body depends on temperature is described by the
Stefan-Boltzmann law. Similar dependence on temperature is exhibited by the intensity of radiation
from an incandescent lamp with a tungsten filament. In this experiment, a Moll thermopile is used to
make a relative measurement which verifies the law. The temperature of the filament can be determined
from the way its resistance depends on temperature, which can be determined very accurately
using a four-wire method.
![Experiment: Stefan-Boltzmann law (230 V, 50/60 Hz), 8000693 [UE4050200-230], Intensity of Radiation](/imagelibrary/UE4050200-230/UE4050200-230_01_Experiment-Stefan-Boltzmann-law-230-V-5060-Hz.jpg)
![Experiment: Stefan-Boltzmann law (230 V, 50/60 Hz), 8000693 [UE4050200-230], Intensity of Radiation](/thumblibrary/UE4050200-230/UE4050200-230_01_1200_1200_Experiment-Stefan-Boltzmann-law-230-V-5060-Hz.jpg)
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![Barrel Foot, 1 kg, 1002834 [U13265], 베이스](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Thermopile, 1000824 [U8441301], 온실 효과](/thumblibrary/U8441301/U8441301_01_140_140_Thermopile.jpg)
![Stefan Boltzmann lamp, 1008523 [U8490050], 광학 램프 및 고정대](/thumblibrary/U8490050/U8490050_01_140_140_Stefan-Boltzmann-lamp.jpg)
![DC Power Supply 20 V, 5 A
(230 V, 50/60 Hz), 1003312 [U33020-230], 전원](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.jpg)
![Digital Multimeter P1035, 1002781 [U11806], 소형 디지털 측정기](/thumblibrary/U11806/U11806_01_140_140_Digital-Multimeter-P1035.jpg)
![HF Patch Cord, 1m, 1002746 [U11255], 실험용 유도전극 및 케이블](/thumblibrary/U11255/U11255_01_140_140_HF-Patch-Cord-1m.jpg)
![HF Patch Cord, BNC/4 mm Plug, 1002748 [U11257], 실험용 유도전극 및 케이블](/thumblibrary/U11257/U11257_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![Tube Holder S -
for the experimental setup of tubes of series S, 1014525 [U185002], 전자관 S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S-for-the-experimental-setup-of-tubes-of-series-S.jpg)
![High Voltage Power Supply 5 kV (230 V, 50/60 Hz), 1003310 [U33010-230], 전원](/thumblibrary/U33010-230/U33010-230_01_140_140_High-Voltage-Power-Supply-5-kV-230-V-5060-Hz.jpg)
![Digital Multimeter P3340, 1002785 [U118091], 소형 디지털 측정기](/thumblibrary/U118091/U118091_01_140_140_Digital-Multimeter-P3340.jpg)
![Set of Experiment Leads for Electron Tube Experiments, 1002847 [U138101], 실험용 유도전극 및 케이블](/thumblibrary/U138101/U138101_01_140_140_Set-of-Experiment-Leads-for-Electron-Tube-Experiments.jpg)
![Teltron Thomson Tube S, 1000617 [U18555], 전자관 S](/thumblibrary/U18555/U18555_01_140_140_Teltron-Thomson-Tube-S.jpg)
![Teltron Diode D, 1000646 [U191501], 전자관 D](/thumblibrary/U191501/U191501_01_140_140_Teltron-Diode-D.jpg)
![Millikan’s Apparatus (230 V, 50/60 Hz), 1018884 [U207001-230], 밀리컨의 실험](/thumblibrary/U207001-230/U207001-230_01_140_140_Millikan-s-Apparatus-230-V-5060-Hz.jpg)
![Digital Spectrometer LD, 1018103 [U22028], 분광 광도계](/thumblibrary/U22028/U22028_01_140_140_Digital-Spectrometer-LD.jpg)
![Spectrum Tube Power Supply (230V, 50/60 Hz), 1000684 [U418001-230], 스펙트럼관 및 램프](/thumblibrary/U418001-230/U418001-230_01_140_140_Spectrum-Tube-Power-Supply-230V-5060-Hz.jpg)
![Air Flow Apparatus, 1000765 [U8404300], 공기역학](/thumblibrary/U8404300/U8404300_01_140_140_Air-Flow-Apparatus.jpg)
![High Voltage Power Supply E (230 V, 50/60 Hz), 1013412 [U8498294-230], 전원](/thumblibrary/U8498294-230/U8498294-230_01_140_140_High-Voltage-Power-Supply-E-230-V-5060-Hz.jpg)
![Experiment: Line Spectra (230 V, 50/60 Hz), Basic equipment, 8000706 [UE5020100-230], Atomic shells](/thumblibrary/UE5020100-230/UE5020100-230_01_140_140_Experiment-Line-Spectra-230-V-5060-Hz-Basic-equipment.jpg)