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Electron diffraction

Product No: P2511300

Principle

Fast electrons are diffracted from a polycrystalline layer of graphite: interference rings appear on a fluorescent screen. The interplanar spacing in graphite is determined from the diameter of the rings and the accelerating voltage.

Tasks

To measure the diameter of the two smallest diffraction rings at different anode voltages.
To calculate the wavelength of the electrons from the anode voltages.
To determine the interplanar spacing of graphite from the relationship between the radius of the diffraction rings and the wavelength.

What you can learn about

Bragg reflection
Debye-Scherrer method
Lattice planes
Graphite structure
Material waves
De Broglie equation

Materiallist (Excerpt)	Product	Amount
Electron diffraction tube	06721-00	1
High voltage supply unit, 0-10 kV	13670-93	1
Power supply, 0...600 VDC	13672-93	1
High-value resistor, 10 MOhm	07160-00	1
Connecting cord, 30 kV, 500 mm	07366-00	1
Vernier caliper, plastic	03011-00	1
Connecting cord, 32 A, 750 mm, green-yellow	07362-15	2
Connecting cord, 32 A, 750 mm, red	07362-01	2
Connecting cord, 32 A, 750 mm, yellow	07362-02	1
Connecting cord, 32 A, 750 mm, blue	07362-04	1
Connecting cord, 32 A, 750 mm, black	07362-05	2
Connecting cord, 32 A, 250mm, green-yellow	07360-15	2
Connecting cord, 100 mm, yellow	07359-02	2
Laboratory Experiments Physics, Chemistry, Biology andApplied Sciences, CD-ROM, incl. operating manuals	16502-42	1