Physics II Laboratory: Reflection and Refraction Name........................................................................Date................. 1. Objective You will investigate the minimizing principle behind the Laws of Reflection and Refraction. Using the Law of Refraction you will determine the indices of refraction of two unknown substances. 2. Apparatus We will be using three simulation tools for this lab. They are listed below. http://physics.bu.edu/~duffy/HTML5/reflection_time.html http://physics.bu.edu/~duffy/HTML5/refraction_time.html https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.html 3. Theory You should review the basic laws of reflection and refraction (Snell's Law), the basic definition of refractive index, and the basic use of the protractor to measure angles. You will apply this knowledge in today's laboratory. We have all heard of and have used the Law of Reflection. It is defined below and displayed in figure 1. Law of Reflection: inc = reflected