In Figure ((1), a beam of light in material 1 is incident on a boundary at an angle of 61 = 30. The extent of refraction of the light into material 2 depends, in part, on the index of refraction n2 of material 2. Figure (b) gives the angle of refraction 62 versus n2 for a range of possible n2 values. The vertical axis scale is set by 620 = 20 and 92b = 40. (a) What is the index of refraction of material 1? (b) If the incident angle is changed to 83 and material 2 has n2 = 3.2, then what is angle 62? 09 820 Bad ._ Mn [,3 l.:'n 1.: 1,9 (a) (11 i (a) Number Units v (b) Number l Units V