Physics

.-67 GO In the ray diagram of Fig. 33-63, where the angles are no drawn to scale, the ray is incident at the critical angle on the inter face between materials 2 and 3. Angle d - 60.0, and two of the in dexes of refraction are n, = 1.70 and /2 - 1.60. Find (a) index o refraction n3 and (b) angle 0. (c) If 0 is decreased, does light refract into material 3? Figure 33-63 Problem 67