Physics

Problem

A thin convex lens has focal length

10\,\text{cm}

. An object is placed

30\,\text{cm}

in front of the lens. Which of the following correctly gives the image distance and nature? a)

7.5\,\text{cm}

on the opposite side; real and inverted b)

15\,\text{cm}

on the same side; virtual and erect c)

15\,\text{cm}

on the opposite side; real and inverted d)

20\,\text{cm}

on the opposite side; real and inverted