Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Chapter 36, Problem 3ASA
To determine
Whether the
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Can a neon atom in glass tube be excited more than once? Explain.
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 a person’s finger and has two light emitting diodes (i.e., LEDs) – a red (660nm) and an infrared (940nm) – and a photocell that detects the amount of light transmitted through the finger at each wavelength
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b)If the intensity of the beams is 1.00X10-6 Watts/m2 , calculate the peak electric and magnetic fields of the light supplied by the LEDs.
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?
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Physics Laboratory Experiments
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