I'm not quite sure what we've got here, Gogu, but--
#1 -- do you mean an electrical or power blackout? That is when the electrical power fails completely in a geographical area and no one has electricity.
#2 -- We enlarge photographs to make them larger. Photographic film (remember that stuff?) is developed and then individual prints are made as enlargements of the negatives. I really have no idea what they do with digital cameras and those little chip thingies.