Physics

Problem

A converging lens with focal length

15\,\text{cm}

is used to project an image onto a screen positioned

45\,\text{cm}

from the lens on the side opposite the object. What is the required object-to-lens distance

s_o

so that a sharp image appears on the screen? a)

15\,\text{cm}

22.5\,\text{cm}

11\,\text{cm}

30\,\text{cm}