Question

i) The height of an object is 19cm and the height of the image obtained using concave lens is 38cm. What is magnification? ​

Answer 1

Answer:

Correct option is

A

-40

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.