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 processing (digital oscilloscope needed)

  • Compact, stable, reliable, and affordable








Introduction

This LEAI-31 Franck-Hertz experiment apparatus can demonstrate the existence of Bohr atomic energy levels. Experimental results can be acquired by manual data recording, or viewed on an oscilloscope, or processed using a digital storage oscilloscope. 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
Power cord1
Instruction manual1

      Franck-Hertz Experiment Apparatus.jpg

Schematic of Franck-Hertz experiment


    Franck-Hertz Experiment Apparatus.png

Experimental results acquired by PC from a digital oscilloscope


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