1. You are given the following equipment for use in the optics experiments in parts (a) and (b). - A solid rectangular block made of transparent plastic - A laser that produces a narrow, bright, monochromatic ray of light - A protractor - A meter stick - A diffraction grating of known slit spacing - A white opaque screen (a) Briefly describe the procedure you would use to determine the index of refraction of the plastic. Diagram? (b) Since the index of refraction depends on wavelength, you need to determine the wavelength of your light source. 2. Dark Slits vs. Bright Slits c=fλ Path Difference: Δl = dsinθ Bright Fringe: dsinθ =mλ Dark Fringe: dsinθ = (m-1/2)λ 3. Does this all have to do with Young's Two Slit Experiment? Setting up something that will create an interference pattern and then using that to determine other things..?