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Crookes Tube "Maltese Cross" 1950's

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Used to demonstrate cathode rays. A negative voltage is connected to the small end and a positive connected to the cross. The tube is evacuated of air and when the voltage is applied electrons (cathode rays) travel from the small electrode towards the the cross, some hit the cross while others carry on and illuminate the end of the tube leaving a well defined shadow. This was the first Cathode Ray Tube invented by Sir William Crookes in circa 1875.

8th Jul 2009

Design and Technology, History, Science

Key Stages:
Foundation, Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4, Key Stage 4+

Science, history, glass, electronics, cathode ray tube

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