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35 PROVE A coin lies on the bottom of a body of water (use as refractive index n = 4/3) 120 cm deep. When viewed

35 PROVE A coin lies on the bottom of a body of water (use as refractive index n = 4/3) 120 cm deep. When viewed from near the vertical through it, as shown in the figure, the angles of incidence and refraction are small, and the approximation sin ( in radians) can be used in Snell's law for both angles. Prove that in this hypothesis the apparent depth of the waterh is 90.0cm

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135 .. DIMOSTRA Una moneta giace sul fondo di uno specchio d'acqua (usa come indice di rifrazione n = 4/3) profondo 120 cm. Quando viene osservata da una posizione prossima alla verticale passante per essa, come indicato nella figura, gli angoli di incidenta e rifrazione sono piccoli e nella legge di Snell e possibile utilizzare l'approssimazione sina = a (a in radianti) per entrambi gli angoli. h h = 120 cm . Dimostra che in tale ipotesi la profondita apparente dell'acqua h e 90,0 cm

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