The power of lens is +2.5D . What kind of lens is it ? And what is its focal length ?

What do you mean by linear magnification produced by mirrors ? The power of a lens is +2.5 D . What kind of lens is it and what is its focal length ? Draw a ray diagram of an image when an object is placed on the principal axis of a convex lens between focus and optical centre.

The power of lens is 2.5 D . What is its focal length ?

The power of a lens is -5D. What is the nature of the lens and what is the focal length?

The focal length of a lens is +150 mm. What kind of lens is it and what is its power?

The power of lens is-1.5 D. Its focal length is-