Physics Lab Equipment

LEAI-31 Apparatus of Franck-Hertz Experiment - Complete Model

LEAI-31 Apparatus of Franck-Hertz Experiment - Complete Model

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 port








Introduction

This LEAI-31 Franck-Hertz experiment apparatus can demonstrate the existence of Bohr atomic energy levels. Experimental results can be recorded by manual data taking, viewed on an oscilloscope, or acquired using a built-in data acquisition card for PC via USB port. No oscilloscope is necessary when using the built-in data acquisition card with a PC. It is an ideal teaching apparatus for physics laboratories at colleges and universities.

 

Using this instrument, the following experiments can be conducted:

 

1. Observe the relationship curve between plate current and accelerating voltage on an oscilloscope

2. Understand the process of electron-atom collision and energy exchange

3. Calculate the 1st excitation potential of Argon atom from experimental data

4. Using the acquired 1st excitation potential to calculate Planck’s constant


Specifications

DescriptionSpecifications
Curve peaks≥ 5
Franck-Hertz tubeArgon gas
Filament voltage VF1 ~ 5 VDC, continuously adjustable 3-1/2 digital display
Accelerating voltage VG2K0 ~ 90 VDC, continuously adjustable 3-1/2 digital display
Micro current measurementrange: 0.1 nA ~10 μA


Parts List

DescriptionQty
Main unit1 set (incl F-H tube, scanning voltage, current amplifier)
BNC cable2
USB cable1
Software CD1
Power cord1
Instruction manual1


Franck-Hertz Experiment Apparatus.png

Experimental data on oscilloscope


LEAI-31-Software.jpg

Experimental curve acquired by software


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