InterviewSolution
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InterviewSolution
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A beam of converting rays of light meets at a point on a screen. A parallel plane glass slab is kept in the path of the converging rays. How for will the intersecting point of the rays be shifted? Draw a diagram to show it. |
Answer» Solution :If a PARALLEL plane glass slab is placed on the pair of the beam of converging rays, the intersecting point of the rays will be shifted away from the PREVIOUS point. We know that, a ray of light incident obliquely on a parallel glass slab emerges with a lateral DISPLACEMENT. In Fig. 271, the PATH of the rays has been drawn and the displacement of the intersecting point has been shown. In the absence of glass slab the rays PQ, XY and RS would meet at O. But due to the presence of the glass slab, the rays meet at O.. Hence, the displacement of the intersecting point = o o.. 
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