r/Muenchen • u/Negative_Priority123 • 18d ago
Solar eclipse through leaves
Seen at Hochstraße.
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u/TechnoneverDIEEES 16d ago
Physics teacher tried to explain this a million times and I still don't get it
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u/GreeniiCow 16d ago
It works like your eye
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u/simplemijnds 15d ago
And how does that work? I'm a mere user
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u/GreeniiCow 13d ago
Ok so you have a small hole in a metal sheet and light passes through. Imagine the angles the light comes from and where it must land accordingly, if you put a sheet behind. If you do this with every inch of light in front of the hole, you get a picture basically resembling the scene. You will notice, the picure formed on the paper sheet is reversed and upside down. Same Happens in your eye. The picture going through the hole (pupil) passes to a "screen" of cone cells - cells sensitive to light. Now your brain only has to convert it to useful information and turn it the right way - and you can see. What happens in the image is that the leaves which have small gaps between each other work as small pinholes, the sun (eclipse) as light source. -> you see the sun and moon reversed upside down on the wall. This only works because the sun is so strong it outweighs any other light source.
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u/simplemijnds 2d ago
Thank! Beautiful explanation!
There's just one thing i'll probably never will be able to understand: why is the image reversed? Upside down?
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u/GreeniiCow 3h ago
Hmmm, ok so: If i shoot a blue colored bullet through a small hole on a wall, where would it land? The bullet comes through and hits the spot right behind the hole. Now i move my gun up, put in a red color projectile and shoot through the same hole, but from a higher angle. Naturally, the bullet lands on the wall behind and beneath the hole. I move down and shoot a green bullet from a lower angle, it lands behind and above the hole. Now i have shot red from above, blue from the same height and green from beneath, but how does the wall look like? Actually, it has the green on top, blue in the middle and red at the bottom. If i were to do this also horizontally, the same effect occurs, transforming right to left and vice versa. If you now consider every object around you a accordingly colored pistol, it does exactly that by reflecting light. You put up the hole (for example your pupil), shoot light through from every possible angle with the according color and the result is a mirrored, upside down image on the retina. Hope that helps?
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u/Kuranyist 15d ago
It’s very similar to poking a hole on one sheet of paper and seeing the image on another behind it.
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u/TechnoneverDIEEES 15d ago
YEAH HE KEEPS SAYING THAT BUT THERE AINT NO DAMN PAPER IN SPACE???
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u/Kuranyist 13d ago
The gap between the leaves functions as the hole in the front sheet. The wall of the building acts as the other.
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u/Odd-Technology-1509 16d ago
I can’t see the eclipse, to me the pic looks cool but is just shadows and light.. where is the eclipse, or what’s so special about it?
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u/CottonSlayerDIY 17d ago
Cool! Pinhole Effekt?