Question

An Object is placed distance of 12cm in front of a concave mirror.it forms a real image four times larger than the object calculate the distance of the image from the mirror pls answer quickly

Answer 1

Object distance(u)= -12cm
Magnification(M)= -4(- is written because the image formed is real)

Image distance(v)= -?

We know, magnification= -v/u
Therefore,
-4 = -v/-12
48= -v

v= -48cm.
Image distance = -48cm.