Please for first part, Enter your answer using units of time. For part C, please enter your answer using units of distance

34 of 37 The fluorescence quantum yield under the same conditions was determined to be 0.7. What is the intrinsic rate constant for radiative fluorescence decay? In a fluorescence-lifetime experiment, a very short pulse of Express your answer to two significant figures and include the appropriate units. 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: HA O B ? Fluorescence intensity Time (ns) TO= 0.10 ns 1 1.1 x 101 4.9 x 103 Submit Previous Answers Request Answer 2.3 x 103 1.3 x 103 X Incorrect; Try Again; 4 attempts remaining 5.6 x 102 Part C It has been determined separately that when the dansyl chromophore is 20 A away from the 11-cis-retinal chromophore in rhodopsin, the efficiency of fluorescence energy transfer is 50% In a second experiment, rhodopsin is covalently labeled with a dansyl chromophore and the observed fluorescence lifetime for the dansyl-rhodopsin complex is 6 ns. What is the distance between the dansyl label and the retinal chromophore in rhodopsin? Express your answer to two significant figures and include the appropriate units. Type here to search O