Most modern instruments now use a _______ as a dispersing element in the monochromator.(a) Prism monochromators(b) Holographic gratings(c) Diffraction gratings(d) Replica gratingsThis question was posed to me in examination.My question is taken from Methods of Monitoring Foetal Heart Rate in division Foetal Monitoring Instruments of Biomedical Instrumentation

Most modern instruments now use a _______ as a dispersing element in t

1.	Most modern instruments now use a _______ as a dispersing element in the monochromator.(a) Prism monochromators(b) Holographic gratings(c) Diffraction gratings(d) Replica gratingsThis question was posed to me in examination.My question is taken from Methods of Monitoring Foetal Heart Rate in division Foetal Monitoring Instruments of Biomedical Instrumentation
Answer» Right option is (c) Diffraction gratings The best I can explain: Most modern instruments now use a diffraction grating as a dispersing ELEMENT in the monochromator, as prisms in general have a poorer stray light performance and require complex precision cams to GIVE a linear wavelength scale. Replica gratings can even be produced more CHEAPLY than prisms and require only a simple sine BAR MECHANISM for the wavelength scale.

Discussion

No Comment Found

Related InterviewSolutions

The transmittance of interference filters varies between ________ % with a spectral bandwidth of 10 to 15 nm.(a) 15 to 20 %(b) 20 to 60 %(c) 10 to 20 %(d) 15 to 60 %This question was posed to me in examination.My query is from Methods of Monitoring Foetal Heart Rate in section Foetal Monitoring Instruments of Biomedical Instrumentation
Modern instruments use ________ light source in calorimeters and spectrophotmetry.(a) Xenon-mercury lamp(b) Tungsten-halogen lamp(c) Mercury arc(d) Deuterium discharge lampThe question was posed to me by my school principal while I was bunking the class.Question is from Methods of Monitoring Foetal Heart Rate in chapter Foetal Monitoring Instruments of Biomedical Instrumentation
What is the most common and convenient source of light?(a) Xenon-mercury arc(b) Hydrogen discharge lamp(c) Neon-xenon arc(d) Tungsten lampI have been asked this question in semester exam.The question is from Methods of Monitoring Foetal Heart Rate in division Foetal Monitoring Instruments of Biomedical Instrumentation
What is ultrasonic frequency employed for obstetric studies?(a) 0.5 to 1 MHz(b) 1 to 1.5 MHz(c) 1.5 to 2 MHz(d) 2 to 2.5 MHzThe question was asked in an international level competition.I'd like to ask this question from Recording System topic in chapter Foetal Monitoring Instruments of Biomedical Instrumentation
Which of the following instrument makes use of the Doppler shift principle?(a) Abdominal Foetal Electrocardiogram(b) Foetal Phonocardiogram(c) Foetus blood flow detector(d) Foetal ECG with scalp electrodeThis question was posed to me in an internship interview.My question is based upon Recording System in chapter Foetal Monitoring Instruments of Biomedical Instrumentation
What is the fixed pulse width of the pulse after process of one-shot circuit?(a) 110 ms(b) 170 ms(c) 230 ms(d) 280 msThis question was posed to me in an online quiz.Origin of the question is Recording System topic in portion Foetal Monitoring Instruments of Biomedical Instrumentation
In sample holders, for such applications, a 50 cm path-length with about a ________ volume cell is employed.(a) 0.3 ml(b) 3 liters(c) 0.3 liters(d) 3 mlThe question was asked in examination.This is a very interesting question from Methods of Monitoring Foetal Heart Rate in portion Foetal Monitoring Instruments of Biomedical Instrumentation
The absorption type optical filter usually consists of coloured glasses, gelatin etc. and solutions of the coloured substances.(a) True(b) FalseThe question was posed to me in unit test.Query is from Methods of Monitoring Foetal Heart Rate in portion Foetal Monitoring Instruments of Biomedical Instrumentation
What is the utilization wavelength limit for quartz?(a) 300 nm(b) 350 nm(c) 180 nm(d) 210 nmThis question was posed to me in an internship interview.This interesting question is from Methods of Monitoring Foetal Heart Rate in division Foetal Monitoring Instruments of Biomedical Instrumentation
_______ are optical systems, which provide better isolation of spectral energy than the optical filters.(a) Spectromators(b) Monochromators(c) Tocochromators(d) BaromatorsI had been asked this question in homework.My doubt stems from Methods of Monitoring Foetal Heart Rate topic in portion Foetal Monitoring Instruments of Biomedical Instrumentation

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment