In Fig. 35-32a, a beam of light in material 1 is incident on a boundary at an angle of 30°. The extent to which the light is bent due to refraction depends, in part, on the index of refraction n2 of material 2. Figure 35-32b gives the angle of refraction θ2 versus n2 for a range of possible n2 values, from na = 1.30 to nb = 1.90.What is the speed of light in material 1?

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02 40° 30° 30 i2 20°L n2 nb T7