Magnification positive or negative difference
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+ means image is erect and - means image is inverted
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if the magnification of an image is negative , then the image is real and if the magnification of an image is positive then the image is virtual
for example - if the magnification of an image is +3 then the image is virtual and 3 times the size of the object
for example - if the magnification of an image is +3 then the image is virtual and 3 times the size of the object
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