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ICSE Class 9 Answered

if the focal length of a lens is 50 cm its power whould be?
Asked by TEJIT PABARI | 11 Jul, 2012, 02:27: PM
answered-by-expert Expert Answer
P=1/f in m
  =100/50
  =2D
Answered by | 11 Jul, 2012, 05:41: PM
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