In a fluorescence-lifetime experiment, a very short pulseof light is used to excite a sample. Then the intensity ofthe fluorescence is recorded as a function of time.Suppose we study a dansyl fluorophore. The intensity ofthe fluorescent light versus time is as follows:Fluorescence intensity Time (ns)1.1 x 1044.9 x 10352.3 x 103101.3 x 103155.6 x 10220Part AWhat is the observed fluorescence lifetime?Express your answer to two significant figures andinclude the appropriate units.T = 6.9 nsSubmitPrevious AnswersCorrectPart BThe fluorescence quantum yield under the sameconditions was determined to be 0.7. What is theintrinsic rate constant for radiative fluorescence decay?Express your answer to two significant figures andinclude the appropriate units.НА?ValueTOUnitsSubmitPrevious Answers Request AnswerX Incorrect; Try Again; 4 attemptsremainingPart CIt has been determined separately that when the dansylchromophore is 20 A away from the 11-cis-retinalchromophore in rhodopsin, the efficiency offluorescence energy transfer is 50%. In a secondexperiment, rhodopsin is covalently labeled with adansyl chromophore and the observed fluorescencelifetime for the dansyl-rhodopsin complex is 6 ns. Whatis the distance between the dansyl label and the retinalchromophore in rhodopsin?Express your answer to two significant figures andinclude the appropriate units.HA?Valuo

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In a fluorescence-lifetime experiment, a very short pulse of light is used to excite a sample. Then the intensity of the fluorescence is recorded as a function of time. Suppose we study a dansyl fluorophore. The intensity of the fluorescent light versus time is as follows: Fluorescence intensity Time (ns) 1.1 x 104 4.9 x 103 5 2.3 x 103 10 1.3 x 103 15 5.6 x 102 20 Part A What is the observed fluorescence lifetime? Express your answer to two significant figures and include the appropriate units. T= 6.9 ns Submit Previous Answers Correct

In a fluorescence-lifetime experiment, a very short pulse of light is used to excite a sample. Then the intensity of the fluorescence is recorded as a function of time. Suppose we study a dansyl fluorophore. The intensity of the fluorescent light versus time is as follows: Fluorescence intensity Time (ns) 1.1 x 104 4.9 x 103 5 2.3 x 103 10 1.3 x 103 15 5.6 x 102 20 Part A What is the observed fluorescence lifetime? Express your answer to two significant figures and include the appropriate units. T= 6.9 ns Submit Previous Answers Correct

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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