7 Modern Physics

Frank-Hertz effect - Video

demonstration image
Catalog: 
7B30.20
Location: 
3_1
Video Encyclopedia :The curve generated by a commercial tube is shown an an oscilloscope.

Laser Diffraction of a Helix

demonstration image
Catalog: 
7A60.930
Location: 
Ga3
The X-ray diffraction pattern of DNA is simulated by the difraction pattern of a laser's light on a coiled filament of a incandescent bulb.

Discharge at low pressures - Video

demonstration image
Catalog: 
7B35.10B
Location: 
3_1
Video Encyclopedia :Pump down a long tube while applying a high voltage across the ends.

Diffusion Cloud Chamber - large

demonstration image
Catalog: 
7D30.60
Location: 
Ad4
Supersaturated Environments Lecture hall Cloud Chamber

Maltese cross - Video

demonstration image
Catalog: 
7B35.40B
Location: 
3_1
Video Encyclopedia :Show the shadow of a Maltese Cross in an electron discharge tube.

Curved Space

demonstration image
Catalog: 
7F20.201
Location: 
0-0
A rubber sheet represents Euclidian Space when not stretched. A dowel stretches the rubber sheet at the desired location. Balls can be rolled on the surface to show how space and time are warped. It can be shown that the shortest distance between two points is no longer a straight line.

Plasma tube - Video

demonstration image
Catalog: 
7B35.75B
Location: 
3_1
Video Encyclopedia :Bring the hand near a commercial plasma tube.

Photoelectric effect in zinc - Video

demonstration image
Catalog: 
7A10.10
Location: 
3_1
Video Encyclopedia :Zinc plate on an electroscope, charged negative, glass UV barrier.

Half life with isotope generator - Video

demonstration image
Catalog: 
7D10.20
Location: 
3_1
Video Encyclopedia :The half life of a barium 137 sample recorded on a computer based analyzer.

"PASCO" Electrometer (Model ES-9078)

Catalog: 
9B20.13B
Location: 
Dg1

The electrometer has a very high impedance and measures voltage directly in electrostatics demos. It is 1000 times more sensitive than a gold leaf electrometer.

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