Images of a slit pair and a transparent scale, with centimetre graduations, are projected onto a distant screen. If a length of 2 cm on the scale is magnified to a length of 36.1 cm on the screen, and the separation of the slit centres is magnified to 2.53 cm, what is the actual separation of the slits? (Note: To the naked eye, the slits appear to be 1 mm-3 mm apart)