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How is Tungsten Halogen lamp differs from normal Tungsten filament lamp used in absorption spectroscopy?(a) It has a tungsten filament and is filled with inert gas(b) Iodine is added to normal filling gas(c) Iodine is coated on tungsten filament(d) Iodine is added to inert gasI have been asked this question in class test.My question is based upon Absorption Instrumentation and Block Diagram Representation topic in division Colorimetry and Spectrometry of Analytical Instrumentation

Answer»

The correct ANSWER is (b) Iodine is added to NORMAL FILLING gas

Easy explanation: In Tungsten filament lamp tungsten filament is ENCLOSED in a bulb of GLASS filled with inert gas or vacuum. In Tungsten Halogen lamp iodine is added to the normal filling glass.



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