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  | 30th May, 2009, 06:30: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.