|The Exploratorium's windows have prismatic treatments on them,|
meaning that certain angles of light produce spectacular displays
of rainbow light all over the gray, industrial walls of the building.
What the heck just happened?
Turns out the upper windows of our part of the Palace of Fine Arts have diffraction grating plastic on them. It splits the light into the spectacular rainbow display when it hits a certain angle, usually an hour after sunrise and an hour before sunset, according to Paul Doherty, senior staff physicist and all-around marvelous human being. Sometimes the display last as long as an hour, apparently. They were installed by the wonderful Pete Stephens, senior exhibit designer and similarly awesome person.
|Glorious! Peculiar! Fleeting! What could be more joyful than |
sudden unexpected beauty?