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प्रश्न
Show by a diagram, the refraction of two light rays incident parallel to the principal axis on a concave lens by treating it as a combination of a glass block and two triangular glass prisms.
आकृति
एक पंक्ति में उत्तर
उत्तर
As shown in the figure the concave lens has two glass prisms and one glass block. One of the glass prisms is situated above the glass block and one below the block.
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Action of a Lens as a Set of Prisms
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