Figure shows variation of magnification m (produced by a thin convex lens) and distance v of image from pole of lens. Which of the following statements is incorrect


            

The unit of power of lens is _____.

The power of lens is $+5 \mathrm{D}$, then the focal length of the lens will be _____.

Define Power of lens. Give its unit.

Find the power of a concave lens of Focal length $2$ (two) metres.

An object is placed at a distance $24 \mathrm{cm}$ in front of a convex lens of focal length $8 \mathrm{cm}$.
(i) Calculate the distance of the image from the lens.
(ii) Calculate the magnification of the image.