1.

UFocal length ofa concave lens is locum to getimage at ben distance find distance ofthe object Also find magnification​

Answer»

Answer:

Concave LENS forms the virtual image of a real object. So, let

u=−4x and v=−x

Then, 3x=10 CM

or x=

3

10

cm

∴u=−

3

40

cm and v=−

3

10

cm

Substituting in

f

1

=

10

−3

+

40

3

or f=−

9

40

or f=−4.4 cm.


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