Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas 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 person's finger and has two light-emitting diodes-a red (635 nm) and an infrared (935 nm) -and a photocell that detects the amount of light transmitted through the finger at each wavelength. (a) Determine the frequency of each of these light sources. red Hz infrared |Hz (b) If 63% 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 2 E I = max 2. -B, 2H0 max

Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas 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 person's finger and has two light-emitting diodes-a red (635 nm) and an infrared (935 nm) -and a photocell that detects the amount of light transmitted through the finger at each wavelength. (a) Determine the frequency of each of these light sources. red Hz infrared |Hz (b) If 63% 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 2 E I = max 2. -B, 2H0 max

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter9: Condensed Matter Physics

Section: Chapter Questions

Problem 81P: A Pb wire wound in a tight solenoid of diameter of 4.0 mm is cooled to a temperature of 5.0 K. The...

See similar textbooks

Similar questions

Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas 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 person's finger and has two light-emitting diodes-a red (636 nm) and an infrared (922 nm)-and a photocell that detects the amount of light transmitted through the finger at each wavelength. (a) Determine the frequency of each of these light sources. 4.72 red Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. Hz 3.25 infrared Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. Hz
Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas 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 person’s finger 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 finger 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.
Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas 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 person's finger and has two light-emitting diodes—a red (649 nm) and an infrared (952 nm)—and a photocell that detects the amount of light transmitted through the finger at each wavelength. (a) Determine the frequency of each of these light sources. red Hz infrared Hz (b) If 71% 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 I = Emax2 2μ0c = c 2μ0 Bmax2.
Oxygenated hemoglobin absorbs weakly in the red(hence its red color) and strongly in the near infrared,whereas 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 ofa person’s finger and has two light - emitting diodes—a red(660. nm) and an infrared (940. nm)—and a photocell thatdetects the amount of light transmitted through the fingerat each wavelength. (a) Determine the frequency of each ofthese light sources. (b) If 67% of the energy of the red sourceis absorbed in the blood, by what factor does the amplitude ofthe electromagnetic wave change?
State the types of resistor colour band in use and hence determine the colours of the following resistors: (i) M56±1%; (ii) 120K±2% (iii) 8R8±10%
State the types of resistor colour band in use and hence determine the colours of the following resistors: (i) K39±10%; (ii) M56±1%; (iii) 3K9±10%; (iv)120K±2% (v) 8R8±10%
A faculty administration wants to change all fluorescent lights in rooms, labs, and classrooms. There are 250 lambs. A regular bulb is 5 TL and a LED bulb is 45 TL. A regular bulb consumes 40 Watts electricity whereas a LED bulb consumes 6 Watts. If electricity price is 0.80 TL per kilowatt-hour, how many days later will LED bulbs be more economical. Assume average working time (of all bulbs) is 6 hours. Note that the time for average life of the bulbs is 3 years.
If the 1st band = Yellow; 2nd band = Violet; 3rd band=Brown; and V = 47 V, then I = COLOR CODE OF RESISTORS Color Number Multiplier Black 0 1 Brown 10¹ Red 10² Orange 10³ Yellow 104 Green 10⁰ Blue 106 Violet 107 Gray 108 White 10⁹ Gold 10-1 Silver 10-² Colorless 1 2 3 5 6 7 8 9 (Ctrl) Tolerance % ± 5% ± 10% ± 20%
A Pb wire wound in a tight solenoid of diameter of 4.0 mm is cooled to a temperature of 5.0 K. The wire is connected in series with a 50resistor and a variable source of emf. As the emf is increased, what value does it have when the superconductivity of the wire is destroyed?
For R1=58, R2=162, R3=243 and 13=5.5 A in the shown circuit, use KCL and KVL to find the following: R2 13( 1)vo R1 ŽR3 i1 (in Ampere) = p a. 5.5 O b. 4.8110151187905 O .0.6889848812095 5 d. 2.4055075593952 i2 (in Ampere) = Oa. -0.6889848812095 O b.0.6889848812095 O c. 6.1889848812095 O d. 3.0944924406048
a)(i) What is the accuracy of a measurement of 26.5gm taken as against 25gm? (ii) State the types of resistor colour band in use and hence determine the colours of the following resistors: (i) K39±10%; (ii) M56±1%; (iii) 3K9±10%; (iv)120K±2% (v) 8R8±10%
A ceramic capacitor has a value of C=10,000 pF. The capacitor consists of a dielectric disc between two paralell metal disc plates. The dielectric disc has a relative permittivity of 40 and a conductivity of 10-12 S/m. The diameter of the disc plates is 1 cm. The voltage across the plates is 100 V. Find the leakage current density in the dielectric in micro Amperes per square meter. Round off your answer to one decimal.