In 1940s Rapatronic Photographic technique was developed by Dr. Harold Edgerton. The technique was used for capturing the growth of fireball of early nuclear explosion and the cameras had exposure time of 10 nanoseconds. Multiple cameras (4 to 10) were set with each rapatronic camera taking just one photograph at different intervals to capture the growth of fireball. Photography Fact Of The Day Interesting! . #nojotophotography #nojoto #photographyfacts #factoftheday