Question

An object is placed at a distance of 8 cm from a convex lens of focal lenght 10cm . ca.lculate the postion , size and nature of the image

Answer 1

Explanation:

Fromlensformulaeweget

f

1

=

v

1

−

u

1

f

1

+

u

1

=

v

1

Nowobjectdistancefromopticcentre=−8cm

andfocallength=10cm

v

1

=

10

1

−

8

1

v=−40cm

Since−vesigntheimagewillforminfrontofthelensandwillvirtual,enlargeanderect.