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Fall2008Final

# Fall2008Final - FINAL TEST MSE 110 Fall 2008 Instructions...

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FINAL TEST MSE 110 Fall 2008 Instructions: Put your name, the number of your section and all your answers on the answer sheet (last page). No notes, paper or books are allowed except the Sargent-Welsh periodic table. Ask if you need more paper. Be aware that the questions can have different weigh. There are no negative points for wrong answers. Good luck Some Equations that you may need : E = h ν , c = λν , mv h = λ , E k =½mv 2 , 2 2 1 mv + Φ = ν h , S V e Δ = 2 2 1 mv = 2 2 1 1 6 . 13 i f f i n n E E , Z n a r o n 2 = , 2 2 6 . 13 n Z E n = , 2 λ n L = , 2 π r=n λ , r ze E Coul 0 2 4 πε = , n rep r C E = , μ σ ne = , μ =L× Δδ ⎛ − = kT E N n g c 2 exp , σ =n h e μ h + n e e μ e , 2 2 R a = , R a 3 4 = , λ = 2d sin θ , 2 2 2 ) ( l k h a d hkl + + = ,…., ] [ ] [Re ln RT E E o Ox d nF Δ = Δ , equ equ Ox d K ] [ ] [Re = , + = 2 1 1 1 2 1 1 m m k π υ λ , 2 1 1 + = = n n I I R o R , v c n = = ε o S I a I 4 λ = , l α = e o I I , 2 1 2 1 sin sin θ θ n n = Some constants and conversions : Planck’s constant: h = 6.626 × 10 -34 J sec Boltzmann’s constant: k = 1.38 × 10 -23 J/K molecule Avogadro’s number: N A = 6.02 × 10 23 molecules/mole Permittivity of space: ε 0 = 8.86 × 10 -12 C 2 /J m Gas constant: R = 8.314 K -1 mole -1 ; Electron charge: e = 1.602 × 10 -19 coul Electron mass: m = 9.1 × 10 -31 kg; Proton mass = 1.67 × 10 -27 kg Speed of light: c = 3 × 10 8 m/sec; Bohr’s radius: a 0 = 52.9 pm 0257 . 0 RT = F Faraday constant: F=96500 C N c = 5 × 10 25 m -3 E o (O 2 /OH-) = 0.40 V E o (O 2 /H 2 O) = 1.23 V 1 eV = 1.602 × 10 –19 J 1 J =1 kg·m 2 ·s -2

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PART I Question 1: The optical window of a transparent solid is limited at short wavelength by electronic transitions. (3pts) (1) TRUE (2) FALSE Question 2: The vibrational frequency increases with the mass of atoms. (4pts) (1) TRUE (2) FALSE Question 3: The absorption coefficient α increases with increasing concentration of impurities. (3pts) (1) TRUE (2) FALSE Question 4: The attenuation of a telecom fiber is very high at 1.55 micron. (4pts) (1) TRUE (2) FALSE Question 5: The refractive index of a fiber core is greater than that of the cladding. (4pts) (1) TRUE (2) FALSE Question 6: Laser light is always monochromatic. (3pts) (1) TRUE (2) FALSE
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