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1/f = 1/v-1/u
1/(-20) - 1/-15= - 1/u
(15-20)/300 = - 1/u
1/u = - 5/300
u = - 60 cm
hi/ho= v/u
hi/5 = -15/-60
hi=5/4 cm=1.25 cm
1/(-20) - 1/-15= - 1/u
(15-20)/300 = - 1/u
1/u = - 5/300
u = - 60 cm
hi/ho= v/u
hi/5 = -15/-60
hi=5/4 cm=1.25 cm
pmilind10:
why u have divided by 300 ????
as -15* -20= 300
I don't think so that we have to do like this
Im sorry i did not read ur reply
Yes we do this is a correct method
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