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![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Feb 2008 11:03:39 IST
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arrey mere dost bada simple hai...
ill tell u the logic
it says that the image must be formed at the point of the object.....to matlab the rays need to retrace their path..that is only possible if the mirror reflects the image by the lens having the same height(as the image by the lens) and at the same position(as the image by the lens)....this happens wen object is at C then image is also at C.....and hence u have
1) apply mirror formula for lens...get v
2) d= v + raduis of curvature of mirror
= 30+20=50...
get it?
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