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CBSE Class 10 Answered

numerical
Asked by | 28 May, 2009, 01:22: PM
Expert Answer

Magnification: v/u=0.25

v=0.25 u =0.5 m

 

We have: 1/f= 1/v-1/u=-1/0.5+1/2=-1.5

Hence f=-2/3 m

Clearly the lens is a concave lens having power 1.5 D.

Answered by | 30 May, 2009, 06:30: PM
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