1b) The experimental set up below in the Optics Lab in Jacaranda Hall 1592 is designed to determine the reflectance of the E-field incident upon a glass prism. Using the prism/laser/photodetector set up (right most figure) you discover that none of the laser beam E-field (p-state or TM Polarization) is reflected when the incident angle is 56.5. (i) Determine the index of refraction (n2) of the prism based on this measurement? (ii) The incident power is measured as seen from the set up on the left. If the incident power is 0.74 mW, what is the ideal reflected power, Pr, when ?i = 17? (iii) From the results above, what is the Reflectance R??

10 cm 0.74 mW Photodetector/meter n=1 (air) 5 cm P =? 632.8nm He-Ne Laser 6 Prism 5 cm