Question 13 (1 point) Calculate the relaxation time for the pulsed laser as described in question...
These compoun is controlled by the energy gap separating the bands Question 9 (1 point) Which of the following statements is false? Ho:Yag laser is used in lithotripsy Kr laser can be used in photo-dynamic therapy to excite exogenous fluorophores Alexandrite lasers can be used for tattoo removals Radiation emitted by the CO2 laser propagates well in all optical fibers Radiation emitted by Er: Yag lasers are strongly absorbed by water Question 10 (1 point) Which of the following statements...
14. The equilibrium relaxation time (measured with a laser-induced pH-jump experiment) of a solution of 1 mM pyridine being protonated (below) at pH 8 is 191 ns. ki HN CHC-N CH HUNCHCN сн, COH Given that the pKof pyridine is 8.75, calculate k, and k..
An Er:Yag laser beam of spot size A = 5 mm2 impinges on tissue. Let us assume the tissue is mostly holding water. The absorption coefficient for this laser is a = 15000 cm-1. How long does it take to vaporize a disk of tissue of thickness L = 1/c if the laser is running continuously and its power is P = 5 W? 0.17s O 1.7 x 10-55 1.7 x 10-35 1.7 s None of the other answers
Question 15 (1 point) A power density of 50 W/cm2 can be absorbed by the rods and the cones found in the retina. Beyond this power density, thermal damage starts occurring in the retina. A dye laser is tuned at 1 = 471 nm and is impinging on the cornea and is then focused on the retina. The focusing system of the eye has a focal length of about f= 20 mm. Find the power density on the cornea of...
Question 13 (1 point) A can of tuna has a diameter of 8 cm and height of 4 cm. Tuna cans are packaged in rectangular boxes with 27 cans in each case. How much paper would be needed to make a label for one of the cans? *cans don't have a label on the top or bottom O 32.9 cm? 100.5 cm2 O 16.7 cm 300.2 cm
Question 6 (1 point) Five groups of three different lasers are listed below. Which group is listing three lasers emitting in the visible spectrum? Nd:Yag, ArF, excimer laser Ruby, Nd:Yag, He:Ne Argon, Ruby, KrF Alexandrite, Er:Yag, CO2 Ruby, Argon, He:Ne Question 7 (2 points) The incident radiation intensity entering the material that is used to make a pair of safety glasses is 107 W/cm2 and the intensity of the radiation measured after transmission is 1W/cm2. What is the optical density...
List of equations: 3 8 ws - of W Erhv n sin = n, sin 02 Tid E, n, cose, - n, cos E n cos & + n, cose E, 712 n, cose, - n, cose, E n, cose, + n cose, 0 = sin(ng/n) 2,27 77 TWO E=Pt E=MCAT m=pV=PAL E= PALGAT E = mcAT+MH = PALCCAT+H). p=1g/cm (for water) P'=P/CSA OD = -Log(1/1) ty= 1/(4K) T(5,1)=T,+(T.-T, Werfel – 2/KT c = lcal/gH = 540 calg 13 Time...
Question 8 (1 point) Consider a system described by the equation 4 NO2 (g) + O2 (g) + 2 N205 (g). At equilibrium, it is found that the [N205] is 0.152 M, [NO2) is 0.278 M, and [Ozis 0.023 M. Calculate Kc. Report your answer to 1 decimal place. Do not include units. Question 9 (1 point) Consider the reaction below: N2O4 (g) 2 NO2 (g) If Kc = 1.79, calculate Kp at 313 K. Report your answer to 1...
Question 6 (1 point) Global warming is described as a horizon. negative externality with a time a) large; short b) small; short c) small; long d) large; long pays you $200 to not have the tree cut down. Question 6 (1 point) Global warming is described as a horizon. negative externality with a time a) large; short b) small; short c) small; long d) large; long
Question 3 Calculate a set of moving averages of period: (a) 3 (b) 5 for the following time series data: 8, 1, 10, 21,4, 9, 12, 10, 23, 5, 10, 13, 1, 26, 6 Which set of moving averages is the correct one to use for obtaining a trenod for the series? Question 3 Calculate a set of moving averages of period: (a) 3 (b) 5 for the following time series data: 8, 1, 10, 21,4, 9, 12, 10, 23,...