Soap bubbles in the process of freezing are fleeting, enigmatic, and almost magical subjects. View large!
Of course, ice is colourless. The colour here was part of an experiment using semi-random coloured filters in front of the bright flashlight that illuminated the bubble from behind. The filter was created by gluing squares of polarizing film in opposition to one another on either side of a cheap piece of plastic. The plastic was from a box of cotton swabs, but a CD case cover works just as well.
This is what you would call “dark field illumination”, a term that people looking through microscopes might recognize. The light source is behind the bubble, just out of the frame on top, angled down. This allows for the full effect of the light, but creates a dark background. If the light source was a little lower, it would take some of the magic away from the bubble.
These bubbles freeze solid in a few seconds. I’ll be doing more experiments with them in the coming week when temperatures drop again. Wish me luck! :)
For my work with snowflakes, visit https://skycrystals.ca/
- winter is an excellent time to take out your macro lens!