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प्रश्न
For finding the focal length of a convex lens by obtaining the image of a distant object, one should use as the object.
(1) a well lit distant tree
(2) window grill in the class room
(3) any distant tree
(4) a lighted candle kept at the other end of the table.
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उत्तर
(1) a well lit distant tree
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क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
