Lab Equipment for Teaching Physics

Note: oscilloscope not included

Features

• No preheating for Argon gas tube

• Multiple modes: manual recording, oscilloscope viewing or data processing (digital oscilloscope needed)

• Visible Argon tube

• Optional data acquisition card for PC use via USB port

  
  

Introduction

The LEAI-30 Franck-Hertz Experiment Apparatus is designed to demonstrate the existence of Bohr atomic energy levels by observing the inelastic collisions between electrons and atoms. This basic model is a cost-effective teaching tool for physics laboratories, particularly in colleges and universities. The experiment provides hands-on experience with the quantization of energy levels in atoms, a foundational concept in quantum mechanics.

In this experiment, electrons are accelerated and collide with Argon atoms. The electrons transfer part of their energy to the Argon atoms, causing the atoms to be excited to higher energy states. The resulting energy loss in the electrons is measured to demonstrate the quantization of energy levels, as predicted by Bohr's model. 

Experimental results can be acquired by manual data recording, or viewed on an oscilloscope, or processed using a digital storage oscilloscope. No oscilloscope is necessary if an optional data acquisition (DAQ) card is ordered for use with a PC via USB port. 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-30 apparatus allows students to conduct the Franck-Hertz experiment, with the following objectives:

1. Demonstrate Bohr Atomic Energy Levels:

   Students will observe how electrons interact with atoms and transfer energy to excite the atoms. This experimental evidence supports Bohr's theory of atomic structure, which posits that electrons occupy discrete energy levels within an atom.

2. Understand Energy Quantization in Atoms:

   The energy loss of the electrons during collisions will be measured, and students will observe quantized energy levels corresponding to the Argon atom's excitation states. This provides experimental proof of the quantization of energy levels in atomic physics.

3. Analyze Electron Collisions and Energy Transfer:

   The apparatus allows students to explore inelastic electron collisions with Argon atoms, demonstrating how electrons transfer energy to atoms and lead to excitation and de-excitation processes in the atom.

4. Data Recording and Analysis:

   Students can practice data collection and analysis using either manual methods or modern tools like oscilloscopes and  (optional) DAQ systems. The recorded data helps students understand how energy levels in atoms are experimentally measured and represented.

Specifications

Parts List