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Oxygenated hemoglobin absorbs weakly in the red (hence its

College Physics | 7th Edition | ISBN: 9780495113690 | Authors: Raymond A. Serway ISBN: 9780495113690 154

Solution for problem 21.45 Chapter 21

College Physics | 7th Edition

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College Physics | 7th Edition | ISBN: 9780495113690 | Authors: Raymond A. Serway

College Physics | 7th Edition

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Problem 21.45

Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, while deoxygenated hemoglobin has the opposite absorption. This fact is used in a pulse oximeter to measure oxygen saturation in arterial blood. The device clips onto the end of a persons nger and has two light-emitting diodes [a red (660 nm) and an infrared (940 nm)] and a photocell that detects the amount of light transmitted through the nger at each wavelength. (a) Determine the frequency of each of these light sources. (b) If 67% of the energy of the red source is absorbed in the blood, by what factor does the amplitude of the electromagnetic wave change? [Hint: The intensity of the wave is equal to the average power per unit area as given by Equation 21.28.]

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Chapter 21, Problem 21.45 is Solved
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Textbook: College Physics
Edition: 7
Author: Raymond A. Serway
ISBN: 9780495113690

Since the solution to 21.45 from 21 chapter was answered, more than 509 students have viewed the full step-by-step answer. College Physics was written by and is associated to the ISBN: 9780495113690. The full step-by-step solution to problem: 21.45 from chapter: 21 was answered by , our top Physics solution expert on 11/15/17, 04:28PM. This full solution covers the following key subjects: red, light, Blood, nger, wave. This expansive textbook survival guide covers 30 chapters, and 2135 solutions. The answer to “Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, while deoxygenated hemoglobin has the opposite absorption. This fact is used in a pulse oximeter to measure oxygen saturation in arterial blood. The device clips onto the end of a persons nger and has two light-emitting diodes [a red (660 nm) and an infrared (940 nm)] and a photocell that detects the amount of light transmitted through the nger at each wavelength. (a) Determine the frequency of each of these light sources. (b) If 67% of the energy of the red source is absorbed in the blood, by what factor does the amplitude of the electromagnetic wave change? [Hint: The intensity of the wave is equal to the average power per unit area as given by Equation 21.28.]” is broken down into a number of easy to follow steps, and 135 words. This textbook survival guide was created for the textbook: College Physics, edition: 7.

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Oxygenated hemoglobin absorbs weakly in the red (hence its