Question

For a thin lens, the magnification \[m\] in terms of image distance \[v\] and object distance \[u\] is given by:

Options

• \[m=\frac{v}{u}\]

• \[m=-\frac{v}{u}\]

• \[m=\frac{u}{v}\]

• \[m=\frac{f}{v}\]

Answer 1

For a thin lens, magnification is given by \[m=\frac{h_i}{h_o}=\frac{v}{u}\]. The magnification is positive for an erect image and negative for an inverted image.