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by askariwa
2920 days ago
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How high is that frequency is yet unknown:
"Tests with Air force pilots have shown, that they could identify the plane on a flashed picture that was flashed only for 1/220th of a second.That is identifying. So it's pretty safe to say, that recognizing, that SOME light was there is possible with 1/300th of a second." http://www.100fps.com/how_many_frames_can_humans_see.htm |
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