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P5.5.2.1 Stefan-Boltzmann law: Measuring the Radiant Intensity of a "Black Body" as a Function of Temperature
P.5.5.2 Laws of Radiation
P5.5.2.1 Stefan-Boltzmann law: Measuring the Radiant Intensity of a "Black Body" as a Function of Temperature
Leybold LD Didactic

P5.5.2.1 Stefan-Boltzmann law: Measuring the Radiant Intensity of a "Black Body" as a Function of Temperature

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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