this post was submitted on 09 Oct 2025
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Science Memes

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[–] mEEGal@lemmy.world 21 points 2 days ago (2 children)

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)

[–] Wolf314159@startrek.website 9 points 1 day ago

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.

[–] Zkuld@lemmy.world 4 points 2 days ago (2 children)
[–] mEEGal@lemmy.world 4 points 2 days ago

My gut says Thales' thorem, but this needs checking.

That's why I was looking for the video