1. Analysis of an interference effect in a clear solid shows that the wavelength of light in the solid is 330 nm. Knowing this light comes from a He-Ne laser and has a wavelength of 634 nm in air. (a) Calculate the refractive index of the solid. Refractive index: (b) Identify the material using the table below. Crown Glass Plexiglass O Zircon Diamond Solids at 20°C Diamond 2.419 Fluorite 1.434 Glass, crown 1.52 Glass, flint 1.66 Ice at 20°C 1.309 Polystyrene 1.49 Plexiglas 1.51 Quartz, crystalline 1.544 Quartz, fused 1.458 1.544 1.923 Sodium chloride Zircon

33. You have a laser (a monochromatic light source) and want to estimate the wavelength. You decide to use a reflective diffraction grating to do this. The light is incident on the grating at 20 degrees with respect to normal. Using a grating with a groove distance of 5 um, the first-order diffraction, is found at an angle of -12.5 degrees. Determine the wavelength of the source. a) 500 nm b) 628 nm c) 808 nm d) 946 nm e) None of the above 34. In Raman spectrometry, Stokes lines have a) lower energy than that of anti-Stokes scattering. b) equal energy to that of anti-Stokes scattering. ) higher energy than that of anti-Stokes scattering d) none of the above 35. Upon ionization of phenol in aqueous solution, maximal UV absorbance changes to longer wavelength. a) True b) False 36. It takes longer time to observe fluorescence than phosphorescence. a) True b) False 37. The vibrational motion of C-H stretching in ethylene as in the figure can be detected by a) IR. b) Raman. c) IR and Raman.…

9. Consider a planar interface with the refractive index n, in the lefthand side and n2 in the right- hand side. Explain what are the boundary conditions needed to be satisfied and how the Snell's rule ni sin(0;) = n2 sin(0;) is derived from the boundary conditions.

A light wavelenght of 594 nm in vacuum passes through a piece of fused quartz of index of refraction n=1.458. a) Find the speed of light in the fused quartz b) What is the wavelength of this light in the fused quartz? c) What is the frequency of the light in the fused quartz?