A concave mirror of focal length 'f' produces an image 'n' times the size of the object. If the image is real, then distance if object from mirror? Share with your friends Share 0 Vipra Mishra answered this Solution m =-v-u =IO =n ((Since image is real and inverted))v =nu1-f =1v+1u =1nu+1u (As mirror is concave so f is negative)-1f =n+1nuf =-nu(n+1)u=-f(n+1)nAccording to sign convention, this is the negative of the distance between object and mirror. Thus distance between object and mirror =f(n+1)n 0 View Full Answer