Left image = Red
Left image
Right image = Cyan
Right image
Mirror = White
Mirror
Lens = Grey
Lens
Path of light = Dotted line
Path of light
Contrat Creative Commons
2006-
Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/doc3do5/public_html/doc/page1431.php on line 93

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/doc3do5/public_html/doc/page1431.php on line 93
2019 Docteur Christophe