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प्रश्न
Show by a diagram the refraction of two light rays incident parallel to the principal axis on a convex lens by treating it as a combination of a glass slab and two triangular glass prisms.
आकृति
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उत्तर
As shown in the figure, the convex 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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