Question

A 2 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm. The distance of the object from the lens is 15 cm. Find the position, nature and size of

the image forms.​

Answer 1

Given: h=20cm,f=+10cm,u=−15cm

f

1

=

v

1

−

u

1

⇒

v

1

=

f

1

+

u

1

v

1

=

10

1

+

(−15)

1

,⇒

30

1

.

Therefore, the image distance, v=30 cm

Also, magnification, m=

u

v

=

−15

30

=−2

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Answer 2

Answer:

size of image -4 cm

hope this is correct