A spherical mirro

Given: magnification, m = -1

Image distance, v =50 cm

Since magnification is negative, it means that the image formed is real and inverted.

_So, v = -50 cm

magnification is given by,

Therefore, u =-50 cm

(a) As image formation is on the screen and is a real image. Therefore, the mirror will be concave mirror.

(b) The distance of the image from the object will be -50 cm.

(c) Applying the lens formula:

so, f= -25 cm

(d) The ray diagram will be as follows: