Question

A convex lens is of focal length 30cm.find distance where object should be placed in front of the lens.so that the image is formed 10cm from the lens? what is the magnification?​

Answer 1

Answer:

Hope it helps

Explanation:

v

1

−

u

1

=

f

1

⇒

v

1

−

−15

1

=

30

1

⇒v=−30

m=

u

v

=−

15

30

m=−2⇒∣m∣=2.

Answer 2

Answer:

-2

Explanation:

1/v-1/u=1/f

1/v-1/-15=1/30

v=-30

m

v

u

-5

15/30

m=-2