Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance ?
ECNALUBMA.
It is written like this in front of an ambulance because when the people driving in other cars look in their rear view mirror they see the "AMBULANCE" because of lateral inversion property of the plane mirror.
It helps the driver to know that Ambulace is coming so he should provide some space.