Geometrical Optics

Two vertical parallel mirrors A and B are separated by \(10 \mathrm{~cm}\). A point object \(\mathrm{O}\) is placed at a distance of \(2 \mathrm{~cm}\) from mirror \(\mathrm{A}\). The distance of the second nearest image behind mirror A from the mirror \(\mathrm{A}\) is _________ \(\mathrm{cm}\).