Answers

2016-02-29T21:33:13+05:30
Fr obtaining position, use lens formula and find v. fr nature use formula m=v/u. if m is negative image is real and inverted and if it i is positive image is virtual and erect. fr finding size use frmula m=hi/ho
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2016-03-01T14:25:47+05:30
To find out position-
1÷v=1÷f+1÷u
where, v= image distance
u= object distance
f= focal length

To find out the nature-
m = v÷u
where, m= magnification
If m is negative then nature is real and inverted.
If m is positive then nature is virtual an erect.

To find out size-
when v,u and ho ( object size) is given to find hi (image size)-
hi÷ho= v÷u
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