5 Questions on Light Matter Interaction - Exam 1 | OSE 5312, Exams of Chemistry

Download 5 Questions on Light Matter Interaction - Exam 1 | OSE 5312 and more Exams Chemistry in PDF only on Docsity! OSE 5312 FUNDAMENTALS OF OPTICAL SCIENCE Fall 2003 Mid Term Exam 1 Thursday, October, 2. This is a closed notes, closed book exam. Answer all questions. Try to use drawings & figures to help explain your answers. Clearly state all your assumptions, definitions and approximations. The number of points for each question is given in italics. Name: ___________________________________ Question Score 1 2 3 4 5 Total 1. Define, in one sentence or with one equation, the following parameters, in each case give units for the parameter: (3 points each) a. χ(ω) b. χ(t) c. Polarization, P d. ε0 e. Real part of refractive index, n(ω) f. Imaginary part of refractive index, κ(ω) g. Absorption coefficient, α(ω) h. Conductivity, σ(ω) 4. The reflectance spectrum of a material is shown plotted versus angular frequency below: R ω( ) ω a. What type of material could this represent? b. The above reflectance is plotted for negligibly small damping. Draw on the same figure how you think the reflectance may look if the damping is just large enough to noticeably affect the reflectance spectrum. c. Sketch the real and imaginary parts of the refractive index, n(ω) and κ(ω), on the axes below. You can either assume no damping, or small damping as above, but you must state which case you are drawing Please ensure that you label the plots to highlight key features, such as where n or κ are zero, etc. n ω( ) κ ω( ) ω d. On the axes below, plot the real part of the dielectric constant, again labeling your graph with any interesting features you deem important. Reε ω( ) ω (Total 26 points)