Linda Grashoff's Photography Adventures

iridescence

The Dumpsters of Oberlin 21


June 17, 2017


The Dumpsters of Oberlin 20


June 16, 2017


The Dumpsters of Oberlin 19


June 15, 2017


The Dumpsters of Oberlin 18


June 14, 2017


Nice Car!


May 19, 2017

Maybe you had to grow up in the Detroit area to hear boys yell that out when they saw a cool car. Probably they wouldn’t have yelled out at this one, though. I, however . . .

 


Had to Get Myself Back to the Garden 11


July 28, 2016

Remember to click the image if you want to see a larger version.

07192016 Schoepfle Garden-35


July Iridescence 7


September 21, 2015

You can see how much Leptothrix discophora favors still river water by how it often insinuates itself in rocks that block the current.07312015 Schoepfle Garden-219


July Iridescence 6


September 14, 2015

You can see enough iridescence here for me to include this photo in the series, but what really got me was how clearly you can see the reflections of individual leaves in the water and Leptothrix discophora film.

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July Iridescence 5


September 7, 2015

Who needs opals when you can have a Leptothrix discophora film?

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July Iridescence 2


August 17, 2015

While the rainbow colors of a more mature film of Leptothrix discophora, such as the one shown in last week’s post, may be more spectacular, I think there’s also something to say for the younger, more subtle, manifestations of this iron bacterium—especially when it’s housed in attractive shale formations. In the first photo, notice how the film seems to disappear when it’s in the shadow of the piece of shale. Sometimes the film becomes invisible in the shade, and sometimes the film can be seen only if a shadow falls across it. Whaaa??? I know the visibility of these films has something to do with the angle of the sun relative to the viewer’s eyes, but the phenomenon must be more complicated.  Where is a physicist with special expertise in optics when you need one?

07252015 Schoepfle Garden-125-Edit

 

07252015 Schoepfle Garden-128