53. Would a prism made of diamond be better at dispersing light than one made of glass? Why or why not?

55. Describe the accepted model of rainbows. Specifically, discuss how the model accounts for the size, shape, location, and color ordering of primary rainbows.

57. Compare the primary and secondary rainbows as regards their angular size, color ordering, and number of internal reflections that occur in the rain droplets.

59. How is a 22 degree halo formed? Describe a measurement technique you might use to distinguish a genuine 22 degree halo from some other "halo-like" phenomenon seen surrounding the Sun or the Moon.