1 00:00:06,070 --> 00:00:03,350 hello you quite often see supposed ufo 2 00:00:08,230 --> 00:00:06,080 photos or videos that are donut shaped a 3 00:00:10,549 --> 00:00:08,240 light with concentric rings very 4 00:00:12,390 --> 00:00:10,559 mysterious but generally it's just an 5 00:00:14,629 --> 00:00:12,400 out of focus star 6 00:00:16,630 --> 00:00:14,639 you can demonstrate this yourself put a 7 00:00:19,189 --> 00:00:16,640 flashlight in a box and make a tiny hole 8 00:00:20,950 --> 00:00:19,199 with a push pin to simulate a star 9 00:00:23,109 --> 00:00:20,960 then back away and focus on something 10 00:00:24,710 --> 00:00:23,119 near you like a door jam or your hand 11 00:00:26,470 --> 00:00:24,720 the point of light will turn into a 12 00:00:28,630 --> 00:00:26,480 donut 13 00:00:30,710 --> 00:00:28,640 why it does this is not really important 14 00:00:33,190 --> 00:00:30,720 but it's called a diffraction artifact 15 00:00:34,870 --> 00:00:33,200 or diffraction rings you can google it 16 00:00:36,790 --> 00:00:34,880 if you want to know more 17 00:00:38,950 --> 00:00:36,800 give it a go and if you see someone post