Crookes Railway Tube
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Uploaded by activity2008 on Nov 18, 2007
This short video was done at the Phyics Lab of Schmidt Schule- Jerusalem during the Physics Club. It shows shows Crookes' Railway Tube. When the high voltage is applied, the paddle wheel travels down the glass "railway tracks" towards the anode. This demonstrates the fact that the cathode rays possess momentum. Each paddle has fluorescent strips attached to it that fluoresce when struck by electrons.
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All Comments (3)
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What's the song in the video??
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Buy railway tubes like this at Sci-Supply. Very cool!
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Nice video. The correct explanation is that the electrons heat the paddles which then turn in the same way a solar radiometer does. The electrons don't have enough momentum on their own to turn the paddles.
AlastairWright 3 years ago
Hi...
Thanks for your comment..But I think electrons like any other particles do have momentum (even photons)..When collide they release heat...but the rotation need a force that is provided by the moving electrons
activity2008 3 years ago