Posted on 05/31/2025 12:49:00 PM PDT by MtnClimber
Explanation: On May 7, the Sun setting behind a church bell tower was captured in this filtered and manipulated digital skyscape from Ragusa, Sicily, planet Earth. In this version of the image the colors look bizarre. Still, an intriguing optical illusion known as an afterimage can help you experience the same scene with a more natural looking appearance. To try it, find the sunspots of active region AR4079 grouped near the bottom of the blue solar disk. Relax and stare at the dark sunspot group for about 30 seconds, then close your eyes or shift your gaze to a plain white surface. In a moment an afterimage of the sunset should faintly appear. But the afterimage sunset will have this image's complementary colors and a more normal yellow Sun against a familiar blue sky.
For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.
🪐 🌟 🌌 🍔
I don’t see it.
"We are programmed to receive
You can check out any time you like
But you can never leave"
The adults told us never to stare at the sun, and here this is.
Speaking of afterimages, I have lived in Hawaii for 20 years and never once seen a green flash.
A brief green afterimage, sometimes.
Probably visited Maui 20 times and saw a few green flashes.
Seems to correlate with umbrella drinks.
re: about page
Worked at hp u-wave components. Packaging, etc. We landed a contract with Hughs for Impatts/F16 radar. Then we lost the process. One test tech’s favorite tuning tool for waveguides was a C-clamp.
Small obstructions in waveguide act as inductors as I recall, providing a tuning device. Altering the dimensions of the rectangular guide by squeezing changes the impedance of the guide, but never messed with that.
Way too far in the mists of time now.
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