• 20 Posts
  • 243 Comments
Joined 2 years ago
cake
Cake day: August 28th, 2023

help-circle












  • Very good. The problem is that singularities are quantum objects. Quantum physics works nothing like classical physics.

    For example, in the case of perpetually falling singularities, would they just quantum tunnel into each other? Or would singularities even exist? According to general relativity, singularities are a sphere that never stops being compressed due to its own gravity. What happens when this sphere hits a diameter smaller than Plank’s length? Does the universe take a screenshot? The point is, we have absolutely no clue about what’s happening here.

    To understand the above, we would first need to understand how gravity works at the quantum level, which we don’t. Why? Gravity is incredibly weak. Studying it is thus, very hard.


  • Read this

    If general relativity is exactly correct (in that there lies a point like singularity at the center of a black hole), then the Roche limit of black holes would be zero. Why would it be zero? Because the singularity isn’t a solid sphere. It’s a point of infinite density with a radius of 0. Basically, what this means is that the concept of a Roche limit ceases to exist here.

    However, we know that general relativity doesn’t correctly describe reality at the quantum scale. Classical physics (which general relativity is based upon) contradicts quantum physics in many ways. Singularities work at the quantum scale. Singularities of black holes also only interact through gravity. Because gravity is incredibly weak, we have not been able to experiment with it at the quantum scale. So we don’t know how gravity works at the quantum scale yet.

    Therefore, we don’t even know if singularities exist inside black holes. Basically, we have no clue about what happens inside black holes, how general relativity and gravity works at small scales and what exactly happens during a black hole merger.

    We could answer the above questions after we understand quantum gravity.







  • UraniumBlazer@lemm.eetoTechnology@lemmy.world*Permanently Deleted*
    link
    fedilink
    English
    arrow-up
    37
    arrow-down
    1
    ·
    2 months ago

    Problem: Higher childhood depression rates linked to social media usage, social media caused disruption in education (like usage in schools), privacy violation of minors, etc.

    An enforceable, common sense solution: Very strict privacy protection laws, that would end up protecting everybody, including minors. Better, kid friendly urban infrastructure like dedicated bike paths protected from car traffic, better pedestrian areas, parks and so on. Kids will get outside their house if there is a kid friendly outside. A greener, more human friendly outside where you can socialize with other humans would always be preferred over doom scrolling online. For the disruption in education issue, it is very education system dependent.

    What solution these people came up with: Make it illegal for individuals under the age of 16 to create social media accounts. How do they enforce this? No idea. Does this solve any of the above problems? No. Is this performative? Yes.

    Speaking from personal experience, social media was one of the most liberating tools for me as a kid. I lived in a shitty, conservative country and was gay. Social media told me that I wasn’t disgusting. I was always more of a lurker than a poster, so I thankfully didn’t really experience being contacted by groomers and so on. However, many of my friends who posted their images and stuff almost always got pedos in their DMs, so that’s a very real issue.

    I could ask my silly little questions related to astrophysics on Reddit and get really good answers. Noone around me irl was ever interested/able to talk about stuff like this. I could explore different political ideologies, get into related servers on Discord and learn more about this. None of this was possible without social media.

    Banning social media outright is such a boomer move lol. Doing so isn’t going to solve any real problems associated with childhood social media usage. It’s just going to give the jackass parents complaining about this a false sense of security, when the kids still end up suffering.