997_Physics ProblemsTechnical Physics

997_Physics ProblemsTechnical Physics - 338 *P35.62 The...

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338 The Nature of Light and the Laws of Geometric Optics *P35.62 The picture illustrates optical sunrise. At the center of the earth, cos . . .. φ θ = × ×+ =− ° = ° 637 10 8614 298 90 2 98 87 0 6 2 m 6.37 10 m 6 At the top of the atmosphere nn 11 22 1 1 1 1 000 293 87 0 87 4 sin sin sin . sin . . θθ = δ 1 2 1 2 FIG. P35.62 Deviation upon entry is δθ θ =− −° = ° 12 87 364 87 022 0 342 ... Sunrise of the optical day is before geometric sunrise by 0342 86 400 82 2 ° ° F H G I K J = s 360 s. Optical sunset occurs later too, so the optical day is longer by 164 s . P35.63 tan . 1 400 = cm h and tan . 2 200 = cm h tan . tan . tan 2 2 2 2 == bg sin sin . sin sin 2 1 2 1 2 2 2 2 1 1 = F H G I K J . (1) Snell’s law in this case is: sin sin = sin . sin 1333 = . Squaring both sides, sin . sin
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