Apparatus of Franck-Hertz Experiment Advanced Model for Advanced Physics Lab

The Apparatus of Franck-Hertz Experiment Advanced Model for Advanced Physics Lab is a sophisticated teaching and research instrument designed to demonstrate the quantized nature of atomic energy levels and provide experimental verification of Bohr’s atomic theory. This advanced version offers enhanced measurement capabilities, greater flexibility, and improved visualization features for studying electron-atom interactions. In the Franck-Hertz experiment, electrons emitted from a heated cathode are accelerated through a gas-filled Argon tube. As the electrons collide with Argon atoms, they transfer discrete amounts of energy to excite the atoms to higher energy states. The resulting variations in collector current provide direct evidence that atomic energy levels are quantized rather than continuous. The advanced model incorporates a visible Argon tube with backlight illumination and an open side window, allowing students to clearly observe the experimental tube during operation. A built-in USB data acquisition system enables direct connection to a computer for real-time data collection, graphical analysis, and storage, eliminating the need for an external oscilloscope. With improved voltage controls, wider current measurement ranges, and the ability to observe up to seven characteristic peaks, this apparatus provides a deeper understanding of quantum mechanics and atomic structure. Physics Lab Experiments from Atico Exports.

Experiments:

Plate Current versus Accelerating Voltage Characteristics:

• Measure and analyze the relationship between plate current and accelerating voltage
• Observe characteristic current peaks and valleys associated with atomic excitation
• Study the quantized energy exchange process

Electron-Atom Collision Analysis:

• Investigate inelastic collisions between electrons and Argon atoms
• Understand the transfer of kinetic energy during atomic excitation
• Examine the role of electron energy loss in producing the Franck-Hertz curve

Determination of the First Excitation Potential of Argon:

• Measure the voltage difference between successive current peaks
• Calculate the first excitation potential of Argon atoms
• Verify experimentally the existence of discrete atomic energy levels

Verification of Bohr’s Atomic Model:

• Demonstrate quantized energy states within atoms
• Relate experimental observations to Bohr’s theory
• Explore the foundations of modern quantum mechanics

Determination of Planck’s Constant:

• Utilize the experimentally determined excitation potential
• Calculate Planck’s constant using energy quantization principles
• Understand the relationship between atomic transitions and quantum theory

Computer-Based Data Acquisition and Analysis:

• Acquire experimental data directly through the USB interface
• Display characteristic Franck-Hertz curves in real time
• Perform detailed analysis and data processing using supplied software

• Franck-Hertz Experiment
• Verification of Bohr Atomic Theory
• Quantum Mechanics Education
• Atomic Excitation Energy Studies
• Electron-Atom Collision Analysis
• Determination of Excitation Potentials
• Measurement of Planck’s Constant
• Modern Physics Laboratory Training

Number of Observable Curve Peaks:

• ≥ 7

Franck-Hertz Tube:

• Argon Gas
• Backlight Illuminated
• Open Side Window

Filament Voltage (VF):

• 1.25 ~ 5 V
• Continuously Adjustable

Filament Voltage Display:

• 3½-Digit Digital Display

Control Voltage (VG1K):

• 0 ~ 6 V
• Continuously Adjustable

Control Voltage Display:

• 3½-Digit Digital Display

Accelerating Voltage (VG2K):

• 0 ~ 90 V
• Continuously Adjustable

Accelerating Voltage Display:

• 3½-Digit Digital Display

Decelerating Voltage (VG2P):

• 1.25 ~ 5 V
• Continuously Adjustable

Decelerating Voltage Display:

• 3½-Digit Digital Display

Microcurrent Measurement Ranges:

• 1 μA
• 0.1 μA
• 10 nA
• 1 nA

Current Measurement Range:

• 0.001 nA ~ 1.999 μA

Current Display:

• 3½-Digit Digital Display

Data Acquisition Interface:

• USB

Software Support:

• Included

Components Included:

Main Unit:

• Including Franck-Hertz Tube, Scanning Voltage Source and Current Amplifier
• Quantity: 1 Set

BNC Cable:

• Quantity: 2

USB Cable:

• Quantity: 1

Software CD:

• Quantity: 1

Instructional Manual:

• Quantity: 1

Power Cord:

• Quantity: 1

• Backlit Visible Argon Tube for Enhanced Observation
• Built-In USB Data Acquisition System
• No Oscilloscope Required for Computer-Based Operation
• High Sensitivity Current Measurement Down to 0.001 nA
• Observation of Seven or More Characteristic Peaks
• Multiple Experimental Operating Modes
• Stable and Accurate Digital Measurements
• Ideal for Advanced Undergraduate and Graduate Physics Laboratories
• No Preheating Required for Argon Gas Tube
• Multiple Modes: Manual Data Recording, Oscilloscope Viewing, or Computer-Based Data Acquisition
• Visible Argon Tube with Integrated Backlight Illumination
• Built-In Data Acquisition Card with USB Interface
• High-Resolution Digital Displays for Voltage and Current Measurements
• Enhanced Measurement Accuracy and Stability
• Ideal for Advanced Quantum Physics Laboratories