Question

STP:T = 0°C = 273.15, 1 atm = 760 mm Hg = 760 Torr = 1.01325 x 105 Pa = 101.325 kPa = 14.70 R = 0.08206 batm = 8.314 motx = 62.36 LF = 1.987 Page 1 of 4 Principles of Chemis Dr. David P. Pursell 1. The Nd YAG laser is used in eye surgery called posteriour capsulotomy, following cataract surgery, to correct cloudiness that affects vision. The laser emits light with a wavelength of 1064 nanometers (nm) in the infrared region of the electromagnetic spectrum. Each laser pulse has 40.5 of energy contains many photos and the pulse lasts for 30.5 nanoseconds (ns). (9) a Determine the frequency of the Nd:YAG light. (9) b. Determine the energy of each photon of Nd:YAG light. (9) c. Determine the number of photons in cach laser pulse. (9) d. The surgery requires 655 laser pulses. Calculate the number of moles of photons used in the sur Il configuration for molybdenum (Mo). Then dra

Answer 1

we kmou Cvelocity of light - 3 *10% m sl aoherre A wAve langt of light 1664 mem -9 =1064 x10 m - freananey f ghr Gx 108 10A4 X10-9 14 2 82 X16 2.22 x10 . Freameney of the Nd YA ght 2. 82 X10 Emerof cach thaten ahere h planks constan 6.626 xID 222 tos E ha = 6.626 X1, 2.02X10 Eanch pulae han energy & enh phatow han energy Num ber of phatens reanured im eah poula 40 5/Pulae 187XI /haton - 2166 XI0 phaims/puhe

6 E) Ranired 2.l 66 X10 photem 2.J66 XI6 ss : 655 - 1918.73 xXto Phutan No areardmg Avadru 1amol photom tuill centin 6.022 x16 phatoms thutons 6S51areBulaus sanred 14 18 73 X1phate 6 022 X1623 phatenn 023 S6 s 13