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![[Post New]](/templates/default/images/icon_minipost_new.gif) 5 Mar 2008 22:25:13 IST
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.derivations of mirror n lens formulae r from geometry where no quantities r negative...so by saying obj distance is -u, u assume tat u will be a negative value so tat -u is positive.........if there werent sign conventions u will have many number of fr
ormulae for each case...like one with + and with - for the other case...
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kaushik krishna .R
bits pilani
mech engg |
this reply: 2 points
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