United Scientific Supplies Franck-Hertz Apparatus II

The Franck-Hertz experiment yields basic evidence for the existence of quantum states.

Supplier:  United Scientific Supplies FHA002

Catalog No. S43701

Description

• The Franck-Hertz Apparatus II is an improved model of the well-known Franck-Hertz Apparatus (FHA001), featuring stable, updated electronics and robust digital readouts for voltage and current.
• New fully shielded coax cables reduce electrical noise.
• The Franck-Hertz Experiment yields basic evidence for the existence of quantum states.
• Inside a vacuum tube filled with a trace of Ar gas, a beam of electrons is generated and accelerated towards a counter electrode.
• A voltage barrier ahead of the counter electrode only allows electrons with a certain minimum energy to get through and make a detectable current.
• As the accelerating energy is increased, changes in the current are observed.
• On the way to the counter electrode, electrons collide with Ar atoms.
• As the electron energy rises, it gives one quantum of energy to the Ar for ionization.
• Now the electron can’t pass the voltage barrier and the current drops.
• Valleys in the current curve are evidence of the donations of a quantum of energy.
• Ar-filled Franck-Hertz tube achieves 5-7 current maxima.
• Anode current range 0.1 nA—1 μA.
• Automatic scan to oscilloscope or chart recorder, or manual scan.
• Adjustable, stabilized filament, grid, and anode voltages.
• 3-1/2 digit voltage and current readouts.
• Requires user-supplied dual-channel oscilloscope for automatic scan.

Specifications

• Grade: 12 to 15
• Product Type: Franck-Hertz Apparatus II
• Languages: English
• Subject: Advanced Physics