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Why do we take radius as half of focal length in this problem ?
Asked by nipunverma59 | 24 Apr, 2019, 04:05: PM
Expert Answer
The focal length is given by
in case of plano convex lens
But in this question we are given that it is biconvex lens.
Hence
Now,
For lens,
Hence the image formed is real and inverted having height 4 cm.
Answered by Utkarsh Lokhande | 25 Apr, 2019, 01:18: PM
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