When we take photographs of our near and dear ones or that of a beautiful scenery, we freeze the happenings at that moment. Whatever may be the size of the photo (in bytes/pixels), all the informations had to come through the lens via the focal point. If there were no aberrations (spherical/chromatic etc), then all these bits of informations will have passed through the focal point only (theoretically). How is it possible? A point (just a point, mind it) holding so much information? If there be simultaneous data transfer, the information density will be maximum at this point, whereas if we think of sequential data transfer, the speed of data transfer at this point had to be maximum. (We just cannot change the speed of light in a specific medium at will, can we?)My profound ignorance in optics won't allow throwing any light on this. Perhaps data congestion/bottlenecks in the nodes of the internet may be addressed to when this is found out. (Presently locomotive behavior of ants are being investigated to find the best net traffic algorithm).
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