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    What focal length of lens to image the object at a magnification of -3

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    Assume that you have an object that you want to image onto a viewing screen 1500mm away from the object. What are the possible image magnifications if you image the object onto the screen with a thin lens of focal length f=160mm? What focal length of the lens would you need to image the object at a magnification of -3?

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    https://brainmass.com/physics/lenses/focal-length-lens-image-object-magnification-71873

    Solution Summary

    With good narrative statements and formulas, the problem is solved. The focal length of lens to image the object at a magnification of -3 is determined.

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