exam1spr2000

# exam1spr2000 - ~, ~ ENGSC 3313, Spring 2000 Answer I. alllO...

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~, ~ ENGSC 3313, Spring 2000 TESTl Name Answer alllO Questions. 2 Doints each. I. Studies indicate that the intensity of green light decays exponentially as it passes through sea water. The intensity at 1.0 meter below the surface is one quarter of the surface intensity. At what depth has the intensity decreased by one tenth compared to the surface intensity? I = Ioe- ~x I = 1.0m, -=0.25 10 In(0.25) = -1.1 (1.0 m) => 1.1= 1.386 m" Decreased by 1/10, so 9/10 left In(0.9) = (-1.386) x ~ x = 0.076 m A metre is defined as 1,650,763.73 of the wavelength of the photon emitted when an electron in Kr86 goes from the 5d to 2p orbital. Please calculate the energy of this transition in e V. Planck's constant is 0.662 x 10-33 Js. The velocity of light is 0.;299 x 109 mls and leV= 0.160 x 10-18 J. 2 hc A E = hv = = 2.04 eV = 3 Please provide an appropriate explanatory caption for this text figure. What have I blocked out? -9I!:Y

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## This note was uploaded on 01/10/2012 for the course ENSC 3313 taught by Professor Staff during the Fall '11 term at Oklahoma State.

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exam1spr2000 - ~, ~ ENGSC 3313, Spring 2000 Answer I. alllO...

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