981_Physics ProblemsTechnical Physics

981_Physics ProblemsTechnical Physics - 322 P35.10 The...

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322 The Nature of Light and the Laws of Geometric Optics P35.10 Using Snell’s law, sin sin θθ 2 1 2 1 = n n θ 2 25 5 . λ 2 1 1 442 == n nm . FIG. P35.10 *P35.11 The law of refraction nn 11 22 sin sin = can be put into the more general form c v c v vv 1 1 2 2 1 1 2 2 sin sin sin sin = = In this form it applies to all kinds of waves that move through space. sin . sin sin . . 35 343 1 493 0266 15 4 2 2 2 ° = = ms The wave keeps constant frequency in f v v = 1 1 2 2 2 21 1 1 493 0 589 343 256 λλ m m . . af P35.12 (a) f c × × 300 10 6328 10 474 10 8 7 14 . . . m Hz (b) glass air nm 1.50 nm = n 632 8 422 . (c) v c n glass air Mms × = 150 200 10 200 8 8 . . . P35.13 sin sin = sin . sin
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