numerical

Asked by  | 28th 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  | 29th May, 2009, 01:06: AM

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