Physics Lab Equipment

LEAI-32 Apparatus of Franck-Hertz Experiment - Advanced Model

LEAI-32 Apparatus of Franck-Hertz Experiment - Advanced Model

Note: oscilloscope not included

Features

  • No preheating for Argon gas tube

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

  • Visible Argon tube with backlight

  • Built-in data acquisition card for PC via USB port








Introduction

The LEAI-32 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 oscilloscope

2. Understand the processes 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≥ 7
Franck-Hertz tubeArgon gas, backlight illuminating, open side window
Filament voltage VF1.25 ~ 5 V, continuously adjustable 3-1/2 digital display
Control voltage VG1K0 ~ 6 V, continuously adjustable 3-1/2 digital display
Accelerating voltage VG2K0 ~ 90 V, continuously adjustable 3-1/2 digital display
Decelerating voltage VG2P1.25 ~ 5 V, continuously adjustable 3-1/2 digital display
Micro current measurement1 μA, 0.1 μA, 10 nA, 1.0 nA, range 0.001 nA ~1.999 μA, 3-1/2 digital display


Parts List

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

LEAI-32 Apparatus-1.jpg

Experimental curve on oscilloscope


       FH-32 Software.jpg

Experimental curve acquired by software

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