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At what pressure should the gases in the sealed tube be maintained in the Hollow cathode lamp?(a) 1 to 5 torr(b) 20 to 30 torr(c) 40 to 50 torr(d) 50 to 55 torrThis question was addressed to me during an online interview.I'd like to ask this question from Atomic Absorption Spectroscopy topic in portion Colorimetry and Spectrometry of Analytical Instrumentation

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Right answer is (a) 1 to 5 torr

The best explanation: It consists of a cylindrical CATHODE and an ANODE made of tungsten. The tube is SEALED and neon and argon are filled at a PRESSURE of 1 to 5 torr.



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