After you´re done with this, you end up with a nice flat mirror. Here´s where the vacuum is needed to force the film into parabolic shape. Extract the air from a little hole in the lid that was ...

Parabolic reflectors are pretty handy devices ... suitable commercial dishes aren’t that hard to come by. But a big, shiny mirror for your solar death-ray needs is another matter, which is ...

The Olympic Flame was lit from the sun's rays using a parabolic mirror, during the final dress rehearsal for the lighting ceremony at Ancient Olympia, in southwestern Greece, on Monday ...