Question

The focal lens has a focal length of 12 cm. At what distance from the lens should an objectof height 6cm be placed so that on the other side of the lens it's real and inverted image is formed 24 cm away from the lens? what would be the size of the image formed? draw a ray diagram​

Answer 1

Answer:

f=+10cm,v=+20cm as image is real and inverted.

Height of the object =2cm(say+ve)

Using

f

1

=

v

1

−

u

1

, we get

u

1

=

v

1

−

f

1

=

+20

1

−

10

1

=

20

+1−2

=

20

−1

=−20cm(=2f)

Image will be of the same size as that of object (as u=v ) and hence, the height of the image

Answer 2

Answer:

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