Question

a convex lens has a four length of 30 cm calculate at what distance should the object be placed from the tens so that it forms an image at 60 cm on the other side of the lens find the magnifiuation produced by the lens in this cuse ​

Answer 1

Answer:

Concave lens produce a virtual erect diminished image

By using len's formula, By consention μ=30 & F=−30

μ

1

+

v

1

=

f

1

⇒

30

1

+

v

1

=−

30

1

⇒

v

1

=−

30

1

−

30

1

⇒

v

1

=−

15

1

v

1

=−0.066

So image is erect, virtual, 15cm from the lens (between lens & object).