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Joined 2 years ago
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Cake day: February 19th, 2024

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  • bort@sopuli.xyztoxkcd@lemmy.worldxkcd #3182: Telescope Types
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    1 month ago

    The wire will cause the entire image to become a little bit darker.

    in a telescope light travels in many paths from start to finish. so a single wire will have a very soft shadow, which stretches over the entire image. This works because the wire is well within the focal length. If the wire was exactly at the focal length, it’s shadow would be sharp, but the farther away it is from the focal length, the softer the shadow will become.

    edit: when the object is exactly at the center of the image, then I think it will still cast a sharp shadow, because all the light-paths that go through the center, stay close to the center. Not sure though






  • bort@sopuli.xyztoScience Memes@mander.xyzGravity!
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    2 months ago

    funfact: because water itself has weight, it produces gravity, therefore it pulls more water towards itself, therefore more water collects in some parts of the world than other.

    for example: most of the extra water that comes from global warmings, collects at the pacific because it has a larger surface, therefore US Eastcoast and Europe see very little change in sealevel, while some pacific islands are already gone.


    epistemic status: I remember reading this info a couple years ago, but the best source I can found now is that sentence from wikipedia:

    Changing ice masses also affect the distribution of sea water around the globe through gravity https://en.wikipedia.org/wiki/Sea_level_rise


  • the problem with ORM is that some people go all in on it and ignore pure SQL completely.

    In reality ORM only works well for somewhat simple queries and structures, but at some times you will have to write your own queries in SQL. But then you have some bonus complexity, that comes from 2 different things filling the same niche. It’s still worth it, but there is no free cake.







  • self promo should be allowed if it’s marked as ad, and the account is older than 12 months, and keeps it down to 1 post/month. update this rule to ban all ads, when ads make up for more than 20% of all posts.

    shirt concepts: dont make a new rule, just because you dont like a single post. whats wrong with you?