本题目来源于试卷: Light: Geometric Optics，类别为 IB物理学
[问答题]
A light ray is incida :5a :q-lt:sz :3ob vuxxt:pbent on a flat piece of glass with inde00ru31of czwy x of refraction n as in (Fig. Below). Show that if the in1zco3w 0fruy0 cident angle $\theta$ is small, the emerging ray is displaced a distance $d=t\theta(n-1)/n$ from the incident ray, where t is the thickness of the glass and $\theta$ is in radians. [Hint: for small $\theta,\sin\theta\approx\tan\theta\approx\theta$ in radians.]
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