Lab Equipment for Teaching Physics

Note: oscilloscope not included

Features

• No preheating for Argon gas tube

• Multiple modes: manual data recording, oscilloscope viewing, or data acquisition with software

• Compact, stable, and reliable

• Built-in data acquisition card for PC via USB

  
  

Introduction

The LEAI-31 Franck-Hertz Experiment Apparatus - Complete Model is a comprehensive teaching tool designed to demonstrate the Bohr atomic energy levels and the fundamental principles of quantum mechanics. This apparatus allows students to conduct a well-known experiment that involves the inelastic collision of electrons with atoms, showing how energy is transferred during the collisions and revealing the quantization of energy levels in atoms.

In this complete model, the experimental setup is designed to provide more advanced features than the basic model, including the built-in data acquisition (DAQ) card for direct connection to a PC via USB, eliminating the need for an external oscilloscope. The results can be recorded manually, displayed on an oscilloscope, or processed through a PC for more in-depth analysis. 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. Observe the Relationship Between Plate Current and Accelerating Voltage:

   Students will observe and measure the relationship curve between the plate current and the accelerating voltage. This curve is important for understanding how energy is transferred between electrons and mercury atoms in the Franck-Hertz experiment.

2. Understand Electron-Atom Collision and Energy Exchange:

   The apparatus provides an opportunity to explore the electron-atom collision process in detail, where electrons collide with Argon atoms and transfer part of their energy to excite the atoms. This process demonstrates energy quantization and the Bohr model of atomic structure.

3. Calculate the 1st Excitation Potential of the Argon Atom:

   Using the experimental data, students can calculate the first excitation potential of the argon atom. This step helps students understand how energy levels in atoms are quantized and can be calculated through experimental techniques.

4. Calculate Planck’s Constant:

   By using the acquired first excitation potential of argon, students can then calculate Planck's constant (h). This experiment demonstrates the relationship between energy and frequency and provides experimental evidence for quantum theory.

Specifications

Parts List