F-H curve of 1st excitation potential on screen
F-H curve of high level excitation potential on screen
Parameters display, setting and adjustment on screen
Features
Micro-current measurement accuracy ± 1%
Multiple modes: manual data recording, direct observation on screen, data export to PC
More than 10 peaks for 1st excitation potential measurement
Can measure higher-level excitation potentials of mercury atoms
Parameters setting, adjustment and display on a touch screen
Introduction
The LEAI-33 Franck-Hertz experiment apparatus can demonstrate the existence of Bohr atomic energy levels of mercury atoms. Experimental results can be recorded by manual data taking, viewed on an built-in screen, or exported to a PC for analysis. The most prominent feature is that in addition to measuring the first excitation potential, it can also measure higher-level excitation potentials of mercury atoms. It is an ideal teaching apparatus for physics laboratories at colleges and universities.
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Using this instrument, the following experiments can be conducted:
1. Understand the processes of electron-atom collision and energy exchange
2. Calculate the 1st excitation potential of Mercury atom from experimental data
3. Study the influence of temperature and voltages on F-H curve
4. Measure high-level excitation potential of mercury atoms
Specifications
| Description | Specifications |
| F-H curve peaks (1st potential) | ≥ 10 |
| Franck-Hertz tube | Mercury filled, diameter 18 mm, height 50 mm |
| Filament voltage VF | 0 ~6. 5 V, adjustable |
| 1st grid voltage VG1K | 0 ~ 12 V, adjustable |
| Accelerating voltage VG2K | 0 ~ 99 V, adjustable |
| Retarding voltage VG2P | 0 ~ 15 V, adjustable |
| Micro current measurement | 0.001 nA - 1.999 μA, accuracy +/- 1% |
| Display | 7-inch LCD screen, resolution 1024 × 600 |
| Furnace | with temperature controller |
| Working modes | automatic scan, manual recording data, exporting to PC |
Parts List
| Description | Qty |
| Main electric unit | 1 unit (incl display screen, voltage sources, current amplifier) |
| Temperature controller | 1 |
| Furnace | 1 |
| A set of cables | 1 |
| Software CD | 1 (manual and data export software) |
| Power cord | 1 |
F-H curve of 1st excitation potential on screen
F-H curve of high level excitation potential on screen
Parameters display, setting and adjustment on screen
