M1 and M2 are two plain mirrors perpendicular to each other, so the image is located at the point 0, between two mirrors the image of an object. Mirror image is a matter of both.
M1 and M2 are two flat glass panes are perpendicular to each other such that the subject is between 0 and 2 mirror image of that object formed by two mirrors are a few pictures.
M1 M2 is a flat mirror and 2 bloom mutual perpendicular as shown in the figure, object at the point 0 between the mirror and 2 asked images of objects from occurring. Both have a mirror image