Question

find the position of image of an object if it is placed 20cm before a convex lens of focal length 10 cm. Also find its magnification. ​

Answer 1

Answer:

Refers to above attachment........

Answer 2

Explanation:

ANSWER

Given:u=−10cm f=20cm (convex lens)

To find: v and image's nature.

Solution: From lens formula

v

1

−

u

1

=

f

1

v

1

+

10

1

=

20

1

v

1

=

20

−1

v=−20cm

And magnification =

u

v

=2

Hence image formed is virtual, erect and magnified two times.