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If the image formed by a lens for all positions of an object placed in frontof it is always erect and diminished, what is the nature of this lens?Draw a ray diagram to justify your answer. If the numerical value of thepower of this lens is 10 D, what is its focal length in the Cartesiansystem? |
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Answer» Power of a lens is given by the relation... P = 1/f(in meter) P=10D F=1/p =1/10 =0.1m Or. -10cm,(as lens in concave lens. ) Hope it helps you |
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