Physics

Problem

An object is placed

30\,\text{cm}

in front of a concave spherical mirror whose focal length is

10\,\text{cm}

. Which of the following gives the image distance

s_i

and the nature of the image? a)

s_i=15\,\text{cm}

behind the mirror; the image is virtual and upright. b)

s_i=7.5\,\text{cm}

in front of the mirror; the image is real and inverted. c)

s_i=15\,\text{cm}

in front of the mirror; the image is real and inverted. d)

s_i=7.5\,\text{cm}

behind the mirror; the image is virtual and upright.