P6.1.4.6 Determining Planck's Constant - CASSY
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Determining Planck’s constant - Recording the current-voltage characteristics, selection of wavelengths using light-emitting diodes, with Sensor-CASSY
In the experiment P6.1.4.6, the light of different colored light-emitting diodes shines one after the other onto the photocathode of a vacuum photocell. 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.
Measurement and evaluation are carried out with the Sensor-CASSY.
Components of Equipment Sets:
| 1 | 558 73 | Table housing with photocell |
| 1 | 558 761 | LED with holder, 375 nm |
| 1 | 558 762 | LED with holder, 400 nm |
| 1 | 558 763 | LED with holder, 435 nm |
| 1 | 558 764 | LED with holder, 505 nm |
| 1 | 558 765 | LED with holder, 545 nm |
| 1 | 521 82 | Voltage Source -5…5 V/0.1 mA |
| 2 | 459 096 | Cable USB (USB Type A - Mini-USB) |
| 1 | 459 095 | Plug-in power supply USB 5 V DC (A socket) |
| 1 | 524 0402 | pA Sensor S |
| 1 | 524 013 | Sensor-CASSY 2 |
| 1 | 524 220 | CASSY Lab 2 |
| 1 | 501 02 | BNC cable, 1 m |
| 2 | 501 45 | Connecting lead 19 A, 50 cm, red/blue, pair |