Stefan-Boltzmann law: Measuring the Radiant Intensity of a "Black Body" as a Function of Temperature - Laws of Radiation

In the two experiments P5.5.2.1 and P5.5.2.2, a cylindrical electric oven with a burnished brass cylinder is used as a “black body”. The brass cylinder is heated in the oven to the desired temperature between 300 and 750 K. A thermocouple is used to measure the temperature. A water-coolable screen is positioned in front of the oven to ensure that the setup essentially measures only the temperature of the burnished brass cylinder. The measurement is conducted using a Moll’s thermopile; its output voltage provides a relative measure of the radiated power M. The thermopile can be connected via the µV box, either to Mobile-CASSY or to the CASSY computer interface device. In the former case, the measurement must by carried out manually, point by point; the latter configuration enables computer-assisted measuring and evaluation. The aim of the evaluation is to confirm Stefan-Boltzmann’s law.

COMPONENTS OF EQUIPMENT SETS:

1	555 81	Electric oven for tubes, 230 V
1	389 43	Black body accessory
1	502 061	Safety connecting box, with earth
1	555 84	Support for electric oven
1	524 005	Mobile-CASSY 2
1	529 676	Temperature probe, NiCr-Ni, 1.5 mm, type K
1	524 0401	µV sensor S
1	557 36	Moll's thermopile
1	460 32	Optical bench with standardised profile, 1 m
2	460 373	Optics rider, 60/5
2	460 374	Optics rider, 90/50
1	460 380	Cantilever arm
1	666 555	Universal clamp, 0...80 mm
1	501 46	Connecting leads, 19 A, 100 cm, red/blue, pair
1	388 181	* Immersion pump
1	521 231	* Low-voltage power supply, 3/6/9/12 V
1	667 194	* Silicone tubing, 7 mm diam., 1 m
1	604 313	* Wide-mouthed can, 10 l

Articles marked with * are not included, we do however recommend them to carry out the experiment.

EXPERIMENT INSTRUCTIONS CLICK HERE