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 is designed to demonstrate the Bohr atomic energy levels of mercury atoms in a hands-on physics experiment. This apparatus not only allows students to measure the first excitation potential of mercury atoms, but also enables the measurement of higher-level excitation potentials, providing a deeper understanding of atomic energy levels and electron transitions. It is an ideal teaching tool for physics laboratories at colleges and universities, offering students the opportunity to explore electron-atom collisions and energy exchange processes.
Experimental results can be recorded through manual data taking, displayed on an integrated screen, or exported to a PC for further analysis, making it flexible for various teaching and learning environments.
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.
The LEAI-33 Franck-Hertz Apparatus allows students to perform the following experiments and achieve key learning objectives:
1. Understand the Processes of Electron-Atom Collision and Energy Exchange:
Students will observe and analyze the collision process between electrons and mercury atoms, understanding how energy is transferred during these collisions, leading to the excitation of mercury atoms.
2. Calculate the 1st Excitation Potential of Mercury Atom:
By analyzing the experimental data, students will calculate the 1st excitation potential of the mercury atom. This will demonstrate the concept of quantized energy levels in atomic physics.
3. Study the Influence of Temperature and Voltages on the Franck-Hertz Curve:
Students will explore how temperature and voltages affect the Franck-Hertz curve, providing insights into the relationship between electron energy, voltage, and excitation of mercury atoms.
4. Measure High-Level Excitation Potential of Mercury Atoms:
In addition to measuring the first excitation potential, students can also measure higher-level excitation potentials of mercury atoms, allowing them to study the multi-level structure of atomic energy levels and gain a deeper understanding of electron transitions in 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
