QuarkQuarkQuark2001 Posted May 29, 2004 Share Posted May 29, 2004 How to prove 1/f= 1/u +1/v? Link to comment Share on other sites More sharing options...
swansont Posted May 29, 2004 Share Posted May 29, 2004 I think the derivation is geometrical - you know the ray going through a focus is parallel on the other side, and the ray going through the center doesn't bend. You end up with a whole bunch of triangles you can compare. Properly applied geometry gives you the formula. Link to comment Share on other sites More sharing options...
Dave Posted May 29, 2004 Share Posted May 29, 2004 This link might be helpful: http://www.saburchill.com/physics/chapters3/0008.html As you said, it's a geometrical proof. Link to comment Share on other sites More sharing options...
arydberg Posted July 13, 2004 Share Posted July 13, 2004 There is another form of this equation. u * v = f^2 However both u and v are measured from the focal point. Link to comment Share on other sites More sharing options...
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