9.A2.0cmtalobjectisplaceperpendiculartotheprincipalaxisofaconcave
lensoffocallength15cm.Atwhatdistancefromthelens,shouldtheobjectbe
placedsothatitformsanimage10cmfromthelens?Alsofindthenatureand
thesizeofimageformed.
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nothing known to any one
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please give right questions which i can give u wrong answers of it
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