Deuterium arc lamp provides emission of high intensity and adequate continuity in the _____ nm range.(a) 0-90(b) 90-180(c) 190-380(d) 390-650I got this question in an internship interview.I'd like to ask this question from Measurement of Volume topic in section Pulmonary Function Analysers of Biomedical Instrumentation

Deuterium arc lamp provides emission of high intensity and adequate co

1.	Deuterium arc lamp provides emission of high intensity and adequate continuity in the _____ nm range.(a) 0-90(b) 90-180(c) 190-380(d) 390-650I got this question in an internship interview.I'd like to ask this question from Measurement of Volume topic in section Pulmonary Function Analysers of Biomedical Instrumentation
Answer» Correct choice is (c) 190-380 Easy explanation: Deuterium arc lamp provides emission of high intensity and adequate continuity in the 190–380 nm RANGE. A quartz or SILICA envelope is necessary not only to provide a heat shield but also to transmit the SHORTER WAVELENGTHS of the ultraviolet radiation. The limiting factor is normally the lower limit of atmospheric TRANSMISSION at about 190 nm.

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