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CBSE Class 10 Answered

A SCREEN IS PLACED 90 CM FROM AN OBEJCT. THE IMAGE OF THE OBJECT ON THE SCREEN IS FORMED BY A CONVEX LENS AT TWO DIFFERENT LOCATIONS SEPARATED BY 30 CM. FIND THE FOCAL LENGTH OF THE LENS.
Asked by sohamsouthpoint02 | 30 Dec, 2017, 01:28: AM
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Answered by | 31 Dec, 2017, 02:25: PM

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CBSE 10 - Physics
A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed.
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