Photos: Gasoline Puddle Comets, Nebulas, Galaxies

[Donkees]

FEBRUARY 28, 2022

Finnish photographer Juha Tanhua points his camera to the ground. He documents his “oil paintings” in broad daylight, shooting gasoline and oil spills usually found in car parks. “I don’t look up, but down,” he tells Colossal. “It’s not space above us; it’s space under our feet. You can find subjects to photograph even in dull places like parking lots. Expect nothing, get everything.”















In 1979, Tanhua began an apprenticeship at a local studio, which launched subsequent careers in journalism and later freelance photography. His works are now included in collections within the Finnish National Gallery and Lahti Art Museum. You can find more of his photos on his website. (via Peta Pixel)

https://juhatanhua.kuvat.fi/

[LastDemocratInSC]

1. Newton rings.

https://en.wikipedia.org/wiki/Newton%27s_rings

[Donkees]

2. Thanks

Thin-film interference
Main article: Thin-film interference
The phenomenon of Newton's rings is explained on the same basis as thin-film interference, including effects such as "rainbows" seen in thin films of oil on water or in soap bubbles. The difference is that here the "thin film" is a thin layer of air.

https://en.wikipedia.org/wiki/Thin-film_interference

[LastDemocratInSC]

3. Thin-film interference on soap bubbles is especially interesting

because you can see areas on the bubble surface where destructive interference creates the appearance of voids, emptiness, no reflectivity, although the surface does exist. When I was young I would try to stick the point of a pencil into the voids and the bubble would burst, of course, but I was puzzled how that could happen with "nothing there but a hole".

The phenomenon is easy to create with soap bubbles but it usually doesn't appear until enough water has evaporated from the bubble to get a very thin wall on the bubble. And the "voids" can appear to swirl around as the wall thickness varies. It's a beautiful sight.

[Donkees]

4. I recently posted a photo thread: Ice Crystals Form on Frozen Bubbles

Here's the link in case you missed it: https://democraticunderground.com/10181601969