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An objecobject 2.4m in front of a lens forms a sharp image on a film 12cm behind the lens. A glass plate 1cm thick,of refractive index 1.5 is interposed between lens and film with its plane faces parallel to the film. At what distance from the lens should object shifted to be in sharp focus of the film?
An objecobject 2.4m in front of a lens forms a sharp image on a film 12cm behind the lens. A glass plate 1cm thick,of refractive index 1.5 is interposed between lens and film with its plane faces parallel to the film. At what distance from the lens should object shifted to be in sharp focus of the film?
