For a lens of focal length f, what value of the distance between the object and the lens[D0] would give an image with a magnification of one?

Is it possible to obtain a non-inverted image with a converging spherical lens? Explain please?

Any response would be greatly appreciated, and I would like to thank anyone for their response to this thread in advance.
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 Hi JM2107, to answer questions like this, you could use use 2 methods: 1) Draw 3 rays, remembering that... ... focal ray becomes parallel ray ... parallel ray becomes focal ray ... central ray is not refracted 2) Use the Law of lenses: 1/o + 1/i = 1/f where o = distance of object from lens i = distance of image from lens f = focal length Got it? [;)]
 Recognitions: Science Advisor It is not possible to obtain a non inverted image using a single converging lens. It is therefore not possible to obtain a magnification of 1, though it is possible to obtain a magnification of -1. (Inverted images have a negative magnification by convention). The reason for this is purely geometrical. Arcnets outlined a standard graphical method of seeing why this is.