For estimating SO2, usually reflectance at ________ wavelengths are used.(a) 1(b) 2(c) 3(d) 4I had been asked this question during an online interview.I'd like to ask this question from Biofeedback Instrumentation in portion Biomedical Recorders of Biomedical Instrumentation

For estimating SO2, usually reflectance at ________ wavelengths are us

1.	For estimating SO2, usually reflectance at ________ wavelengths are used.(a) 1(b) 2(c) 3(d) 4I had been asked this question during an online interview.I'd like to ask this question from Biofeedback Instrumentation in portion Biomedical Recorders of Biomedical Instrumentation
Answer» Right ANSWER is (b) 2 To explain I WOULD say: For estimating SO2, usually the REFLECTANCE at two wavelengths, one in the RED and the other in the near infrared REGIONS, are used.

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