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Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using interference filters on the optical bench

VP6.1.4.4
Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using interference filters on the optical bench
Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using interference filters on the optical bench Current-voltage characteristics of the photocell (P6.1.4.4)
Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using interference filters on the optical bench

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Description

In the experiment P6.1.4.4 one of the emission lines from a mercury gas discharge lamp is selected by interference filters and focused onto the photocathode. The countervoltage of the anode is varied and the resulting current is measured with high sensitivity. The variation of the characteristic curves under irradiation with different wavelengths leads to the determination of Planck's constant h.

Components of equipment sets

1 55877 Photocell for determining Planck's constant LD
1 558791 Holder for photocell LD
1 460335 Optical bench with standardised profile, 0.5 m LD
2 460374 Optics rider, 90/50 LD
3 460375  8  Optics rider, 120/50 LD
1 558792  4  Filter wheel with diaphragm LD
1 468401 Interference filter, 578 nm LD
1 468402  4  Interference filter, 546 nm LD
1 468403 Interference filter, 436 nm LD
1 468404 Interference filter, 405 nm LD
1 468406  4  Interference filter, 365 nm LD
1 46003 Lens in frame, f=100 mm LD
1 46026 Iris diaphragm LD
1 45115 High pressure mercury lamp LD
1 451195  4  Power supply unit for high-pressure mercury lamp LD
1 53200 I-measuring amplifier D LD
1 524013 Sensor-CASSY 2 LD
1 524220 CASSY Lab 2 LD
2 57681 Plug-in board safety socket, 20/10 LD
3 57686 Monocell holder STE 2/50 LD
3 68548  8  Mono cell 1.5 V (IEC R20) LD
1 57793  4  Potentiometer, 1 kΩ, 10-turn, STE 4/50 LD
1 57913 Toggle switch STE 2/19 LD
1 50148 Bridging plugs STE 2/19, set of 10 LD
2 500621 Safety experiment cable, 50 cm, red LD
2 500622 Safety experiment cable, 50 cm, blue LD
1 500644 Safety experiment cable, 100 cm, black LD
1

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P6.1.4.4 Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using interference filters on the optical bench
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Physics
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