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CBSE Class 10 Answered

question based on convex lens..........
Asked by krithika.rrrr | 21 Apr, 2009, 02:45: AM
answered-by-expert Expert Answer

Here Focal length: f=1/4 m = 100/4 cm
Image distance : v= 40cm

Using Lens formula : 1/f = 1/v - 1/u

4/100 = 1/40 - 1/u      =>   Solving the equation we get u = -200/3 cm

Answered by | 23 Apr, 2009, 01:38: PM
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