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a concave lens of focal length 20cm forms and image at the distance of 10cm from the lens what is the distance of the object from the lens |
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Answer» Answer: GIVEN f = - 20 cm, (sign convention) , v = - 10 cm (∴ image FORMED by CONCAVE LENS is virtual) By using lens formula, or u = - 20 Thus the object is placed at 20 cm from the concave lens |
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