The Franck-Hertz Apparatus is a precise laboratory instrument used to show that atoms have distinct energy levels and quantized states.It helps students gain hands-on experience with a key experiment that supports quantum theory.The device uses an Argon-filled tube, which eliminates the need for heating the tube.This makes the experiment easier, quicker, and more convenient than older systems that used mercury.
The apparatus allows users to record experimental data manually or display it directly on an oscilloscope or computer for further analysis and observation.
The instrument provides stable and adjustable voltages for conducting the experiment:
UG1K: 1.3 to 5 volts
UG2A (Retarding/Rejecting Voltage): 1.3 to 15 volts
UG2K Measurement Voltage: 0 to 100 volts
Oscilloscope Sawtooth Output: 0 to 50 volts
Filament Voltage (UH): AC 3 V, 3.5 V, 4 V, 4.5 V, 5 V, 5.5 V, and 6.3 V
The apparatus includes a built-in sawtooth voltage generator for oscilloscope-based measurements:
Scanning Voltage Range: 0 to 50 volts
Scanning Frequency: 115 ± 20 Hz
Scanning Output Amplitude: ±1 volt
The device has a highly sensitive current measurement system that allows precise observation of electron collisions inside the tube:
Measurement Range: 10⁻⁶ A to 10⁻⁹ A
Four selectable ranges for greater accuracy
Operating Conditions
The apparatus is built for reliable use in typical laboratory environments:
Ambient Temperature: –10°C to 40°C
Relative Humidity: Up to 85% at 40°C
Supplied Accessories
The complete setup includes the following components:
Franck-Hertz Experimental Unit
Argon Tube
Oscilloscope Connection Wires (3 pieces)
Detailed Operating Instruction Manual
The Franck-Hertz Apparatus is a valuable educational tool for demonstrating quantum phenomena, electron-atom interactions, and energy quantization, making it a key instrument for use in physics laboratories, universities, and research facilities.
