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Asked by tasminmazumdar | 01 Jun, 2021, 12:48: AM
Expert Answer
Focal length f of combination of lenses separated by distance d is given by
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
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