Use the mouse to drag the protractor from the toolbox to the screen. Use the red button to turn the laser on. Move the laser to set the angle of incidence to 50 degrees. Leave material in the upper section of the screen with the index of refraction = 1.00. Vary the index of refraction of the material in the lower portion of the screen to the values specified by your instructor in the Questions and Answers for Module 6 Discussion Board. Record your results in your laboratory notebook. Use a table of indexes of refraction to find materials representative of various indexes of refraction. Look up at least 3 of their densities. In general, how does the index of refraction vary with the density of the material