Question

converging has focal length of 40 cm. if it forms a virtual image at a distance of 15cm. find the object distance.​

Answer 1

Answer:

All symbols used have their usual meanings.

v

1

−

u

1

=

f

1

−30

1

−

u

1

=

15

1

u

1

=

30

−1

−

15

1

u=−10cm