234 00:19:14,640 --&amp;gt; 00:19:17,280 you would expect some of them going through this slit, 235 00:19:17,280 --&amp;gt; 00:19:20,720 some going through this slit, so we would expect two stripes, 236 00:19:22,760 --&amp;gt; 00:19:26,600 but what you get is something completely different.