What does the negative sign mean in the microscope magnification equation?

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Audaciity

I came across http://hyperphysics.phy-astr.gsu.edu/hbase/geopt/micros.html

Any idea what the negative sign indicates in the m_o equation?

Last edited by a moderator: May 4, 2017

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Andy Resnick

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I couldn't open the link.