Physics

Comments

• NielsBohron@lemmy.world ⁨1⁩ ⁨year⁩ ago

  I will not stand for this Planck erasure! Sure, Einstein and Maxwell are great, but how can you leave off the father of quantum mechanics when a third of the poster is a direct result of his research

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• gianni@lemmy.ca ⁨1⁩ ⁨year⁩ ago

  As a non-sciencey person, can someone explain the chasm of ignorance?

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  • FiveTimbers@lemmy.world ⁨1⁩ ⁨year⁩ ago

    Most of the “chasm of ignorance” is the stuff we know that we don’t know. We don’t know what dark matter is made of. We don’t know what dark energy is. We don’t know how to reconcile quantum mechanics and general relativity.

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    • HawlSera@lemm.ee ⁨1⁩ ⁨year⁩ ago

      We don’t even know if there IS Dark Matter

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    • HootinNHollerin@lemmy.world ⁨1⁩ ⁨year⁩ ago

      It is it the stuff we don’t know that we don’t know?

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  • ieatpwns@lemmy.world ⁨1⁩ ⁨year⁩ ago

    I’m not a physicist, but im pretty sure it’s just the gaps in our knowledge like exactly how/why gravity works. And like we don’t know the things we don’t know so it’s all in the chasm.

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• stepan@lemmy.cafe ⁨1⁩ ⁨year⁩ ago

  I’ve had this poster in class!

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• ininewcrow@lemmy.ca ⁨1⁩ ⁨year⁩ ago

  Isaac Newton — ‘To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me’

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• Fosheze@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Dark matter is just the friends we made along the way.

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• Diplomjodler3@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Who would win? All the physicists or one slitty boi?

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• lemming@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

  Cosmology and astrophysics are considered classical? I would expect both quantum physics and relativity to play a major role nowadays.

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  • Chrobin@discuss.tchncs.de ⁨1⁩ ⁨year⁩ ago

    At least cosmology does use some serious quantum physics, even quantum field theory. Source: took 1 year of theoretical cosmology lectures.

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• cr0nic_s0nic@lemm.ee ⁨1⁩ ⁨year⁩ ago

  damn you doing philosophy dirty

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• flambonkscious@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

  Naïve question: Is there a reason why electric and magnetic fields look so similar?

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  • SpeakerToLampposts@lemmy.world ⁨1⁩ ⁨year⁩ ago

    They’re similar in some respects, different in others; this happens to only show ways they’re similar. Specifically, it only shows dipole (two-pole) fields, with the field lines running from one pole (North or +) to the other (South or -).

    But there are also electric monopoles: things that’re only + (e.g. protons) or - (e.g. electrons), which’ll have field lines radiating out in all directions rather than looping back. Magnets are different in that as far as we know, magnetic monopoles don’t exist. Every North pole’s directly attached to a South pole and vice versa. You can get magnets with more than two poles, or even more complex arrangements (e.g. refrigerator magnets normally have alternating North and South stripes), but they’ll always have equal amounts of Northness and Southness, so the net magnetic charge is always zero.

    Another (related) difference is that moving electric charges (e.g. electric currents in a wire) create loops of magnetic field. That is, the field line just goes in a circle around the moving charge, rather than from N to S. Since there’s no such thing (as far as we know) as a magnetic charge, that can’t happen with the electric field.

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    • flambonkscious@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

      Wow, that’s really interesting - thanks!

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  • Tlaloc_Temporal@lemmy.ca ⁨1⁩ ⁨year⁩ ago

    Naïve answer: A magnetic field is an electric field moving through time. There’s some matric math that equates moving electric charges to magnetic force, I think Maxwell’s equations? So it’s kind of about direction, but through time.

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• ilost7489@lemmy.ca ⁨1⁩ ⁨year⁩ ago

  We have this on the wall in my physics class

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• Zerush@lemmy.ml ⁨1⁩ ⁨year⁩ ago

  Science has always been wrong, converging towards the truth. The scientific method is based on this.

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• RecursiveParadox@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Very cool poster, thanks!

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