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Asked by tasminmazumdar | 01 Jun, 2021, 00:48: AM
Focal length f of combination of lenses separated by distance d is given by
![begin mathsize 14px style 1 over f space equals space 1 over f subscript 1 plus 1 over f subscript 2 minus space fraction numerator d over denominator f subscript 1 space f subscript 2 end fraction end style](https://images.topperlearning.com/topper/tinymce/cache/82535bfcc864fc726b9a665c689b0ede.png)
where f1 and f2 are the focal lengths of individual lenses
we have f1 = 10 cm , f2 = -5 cm and d = 5 cm
if we substitute values in above expression for combined focal length , we get combined focal length is infinity
Hence image will be formed at infinity
Answered by Thiyagarajan K | 01 Jun, 2021, 08:27: AM
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