9.根據司乃耳定律(Snell' s Law),空氣中的光(n = 1.00)以6°的入射角,入射到平坦的水面(n = 1.33),折射角為何?
(A)4.5°
(B)6°
(C)7.5°
(D)9°

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統計: A(0), B(0), C(1), D(0), E(0) #3987106