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 Community Discussion Question:
optics
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 30 Nov 2007 18:38:07 IST
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Two thin convex lenses of focal lengths f1and f2 are separated by a horizontal distance d (where d<f1, d<f2) and theri centres are displaced by a vertical separation r as shown in fig.
Taking the origin of coordinates, O, at the centre of the first lens, the x and y-coordinates of the focal point of this lens system for a parallel beam of rays coming from the left are given by:
Ans: x=(f1f2+d(f1-d))/(f1+f2-d) , y=r(f1-d)/(f1+f2-d)
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