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The eyepiece of an astronomical telescope has a focal length of 10cm.The telescope is focused for a normal vision of a distant object when the length of tube is 1.0m .Find the focal length of objective and magnifying power of objective

The eyepiece of an astronomical telescope has a focal length of 10cm.The telescope is focused for a normal vision of a distant object when the length of tube is 1.0m .Find the focal length of objective and magnifying power of objective

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