I seem to recall from a long-forgotten science class that the speed of light was 186,000 miles per second (about 300,000 km per second for you youngsters). Photography means 'writing with light' and the photo below appears to have captured a blue beam of light within the rings. An optical illusion. The second photo provides another view.
It's only (officially) day 5 of the 365 day project but I'm having fun. Part of the daily challenge is to determine what to photograph and to make it unique.