Shaped metal plate which projects thin cathode ray beam along phosphored plate.
Large green phosphor screen which enables beam to be visible in bright rooms.
Cathode rays beam is moveable with an ordanary magnet. Positive poles will attract bean and negative poles will repel beam.
Durable eyelet tube leads, perfect for aligator clips.
Magnet included to deflect rays.
Classic Magnetic Deflection Tube Ever wonder why the Aurora borealis arcs and twists or how television tubes show moving pictures? Our Classic Magnetic Defelection Tube will show you how in a very simple way! This Crookes tube was developed from the curosity as to wheather cathode rays were magnetic by the pioneering electrical scientists of the 1800s. Operating the Classic Magnetic Deflection Tube: As with all of our Aurora Tubes, the Classic Magnetic Deflection Tube requires a high voltage power supply and alligator clips. Our induction coils are specilly designed for Aurora Tubes. Connect high voltage negative output to round emitter plate lead and positive to rod shaped reciving electode at opposite end of tube via alligator clips. Turn on high voltage power supply and watch as a straight beam is projected across the phosphor screen. To move cathode raybeam, place the pole of a magnet perpendicular to beam and manupilate! As with all of our Crookes Tubes, our Classic Magnetic Tube interpertation is very fargile due to it's artesinal glass construction. Use caution and never handle tube when energized. Crookes Magnetic Deflection Tube Historical Significance: The magnetic deflection tube is of historical significance as electrons were proven to exist due to devices much like these. Thanks to J.J. Thomson, electrons were discovered as cathode rays seemed to as they observeFaraday's law of induction. In short, Thompson noted that the "stuff" inside of an energized vacuum tube was repelled and attracted by magnets or charged plates inside of the excited tube. This discovery didn't happen instantly and some complicated calculations were involved to prove this theory.
Aurora Tubes by Active Statics
Most Helpful Customer Reviews
A very reasonably-priced scientific instrument that can be used to demonstrate that a magnetic field or electrically charged plate can attract/deflect the cathode (electron) ray. It is very useful to show students how the electron was discovered in a Chemistry or Physical Science course. It works really well the included magnetic, although you have to be sure to flip the magnet, rather than rotate it (or no difference will be noticed).
In terms of what you will need to use with this kit, you will definitely need a direct current of thousands of volts to excite the electrons within the glass tube. The best way to generate this voltage is to use a tesla coil wand, which many schools may have on hand.
NOTICE: If you don't have a tesla coil or high-voltage source, I wouldn't bother purchasing this (unless you are willing to shell out another $100-200 bucks). There may be other ways to make a high voltage source, but it's not going to be a piece of cake.
Great demonstration for physics and chemistry classes! Priced just right
This is an exceedingly cool physics demonstration at a very affordable price. I'm actually purchasing a second one, as the first one broke spectacularly when I...um...accidentally knocked it off my desk :(
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