In Figure a, a beam of light in material 1 is incident on a boundary at an angle of θ1 = 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 θ2 versus n2 for a range of possible n2 values. The vertical axis scale is set by θ2a = 20.0? and θ2b = 40.0?.

(a) What is the index of refraction of material 1?

(b) If the incident angle is changed to 60? and material 2 has n2 = 2.4, then what is angle θ2?

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в, Вда, 1.3 1.5 1.7 1.9 (a) (b)