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Clinical Chemistry I ASCP review 2023 QUESTIONS WITH COMPLETE SOLUTIONS ALREADY PASSED A+ VERIFIED

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Which of the following lamps provides a continuous spectrum of radiant energy in the visible, near IR, and near UV regions of the spectrum? A. Tungsten-filament B. Hydrogen C. Deuterium D. Mercury vapor - ANS A most common light source for photometry in the visible region. continuous spectrum (360-800 nm). near IR and UV. Hydrogen and Deuterium (200-375 nm) Mercury vapor- not a continuous spectrum, emitting radiation at specific wavelengths Which of the following isolates light within a narrow region of the spectrum? A. Photomultiplier tube B. Monochromator C. Photovoltaic cell D. Detector - ANS B Use for selecting a narrow band wavelengths from a continuous spectrum. Three kinds (prisms, filters, diffraction gratings. Which of the following is not descriptive of a photomultiplier tube? A. Emits electrons proportionally to initial light absorbed B. Must be shielded from stray light C. Cannot be used with a chopper D. Amplifies the initial signal received - ANS C PMT- responds to the radiant energy light it absorbs by emitting electrons in a proportional amount to the initial light absorbed. Which of the following is false about a photomultiplier tube?


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