You can actually use this, or more generally the shadow of a tree on any sunny day to calculate the distance to the sun !
(Can’t seem to find the video demonstrating it, but I have a feeling it’s from Physics Girl or Up And Atom on youtube)
The ratio of the size of the image to the distance from the pinhole is the same as the ratio of the size of the sun to the distance to the sun.
how?
My gut says Thales’ thorem, but this needs checking.
That’s why I was looking for the video
We have LED street lights and our driveway is lined with crepe myrtles. Every evening after dark, I can see the grid pattern of the individual LEDs in the shadows on our driveway. It’s trippy when there’s a slight breeze, and all these little “grid shadows” are moving around overlapping each other
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You can make a hole with your fingers and see the patterns of very bright lights above you, stadium lights etc. It’s just a vertical camera obscura. I remember the 90s solar partial eclipse really well because I was riding home from school, the leaves and even the spokes on my bike projected moons everywhere, it was completely magical.
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Picture I took in Texas during the eclipse
Here is one I took using our hands to create the effect.
I’m having a hard time understanding this. How many hands do you have? How can you use 2 hands to create this effect and still hold a camera?
we’re not going through this again
Best bokeh balls
Thought it was just my coffee table
<Clears throat> well technically thats shadow of moon multiplied “naturally”.
Heey, it’s Elden Ring!
Heey, it’s the intro to Heroes on NBC
Reminds me of a few Cessna’s i worked on.
Jealous.
Oh i was just the mechanic
Still jealous haha! They’re such cool planes. I used to process aerial imagery from them.
Ah nice! I liked the Lancairs, i got to fly one of them. For working in i think Pipers were my favorite, especially the Malibu. Plenty of space and logical layouts.
I guess working in the engines was nicer in the Cessnas since there was less baffling and no turbo, less places to drop books and nuts.
C
C++
Big if true
Ye older Arboreal Eclipse
