Question
Sat April 03, 2010 By: Prasang Bhatnagar

numerical

Expert Reply
Thu April 08, 2010

f = +18 cm
v = +24 cm
u = ?

Therefore using the lens formula we get,

1/v - 1/u = 1/f

ie, 1/u = 1/v + 1/f

           = 1/24 - 1/18

           = (18-24)/(24x18)

           = (-6)/(24x18)

           = (-1)/(24x3)

           = -1/72

thus, u = -72 cm.

Hope this helps
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