ch33-p072 - 72. (a) The first contribution to the overall...

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(c) Similarly, we find that the second-order θ dev minimum for blue light (for which n = 1.343) is 233.48° 233.5 ≈° , and this occurs at i = 71.52°. (d) The difference in dev in the previous two parts is approximately 3.1°. (e) Setting k = 3, we search for the third-order rainbow angle numerically. We find that the dev minimum for red light is 317.5°, and this occurs at i = 76.88°. (f) Similarly, we find that the third-order dev minimum for blue light is 321.9°, and this occurs at i = 76.62°. (g) The difference in dev in the previous two parts is 4.4°. 72. (a) The first contribution to the overall deviation is at the first refraction: δθ 1 =− ir . The next contribution(s) to the overall deviation is (are) the reflection(s). Noting that the angle between the ray right before reflection and the axis normal to the back surface of the sphere is equal to
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