Lenard tube

Lenard tube

noun Electronics.
an early cathode-ray tube having at the end opposite the cathode a window of thin glass or metal allowing cathode rays (Lenard rays) to pass out into the atmosphere.

Origin:
named after P. Lenard
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Lenard tube is always a great word to know.
So is capacitive reactance. Does it mean:
opposition of capacitance to alternating current
electric current that reverses direction at regular intervals
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