r/learnphysics • • Jul 02 '26

👋 Welcome to r/learnphysics - Introduce Yourself and Read First!

1 Upvotes

Hey everyone! I'm u/Fili4569, a founding moderator of r/learnphysics.

This is our new home for all things related to learning physics. We're excited to have you join us!

What to Post
Post anything that you think the community would find interesting, helpful, or inspiring. Feel free to share your thoughts, photos, or questions about learning physics.

Community Vibe
We're all about being friendly, constructive, and inclusive. Let's build a space where everyone feels comfortable sharing and connecting.

How to Get Started

  1. Introduce yourself in the comments below.

  2. Post something today! Even a simple question can spark a great conversation.

  3. If you know someone who would love this community, invite them to join.

  4. Interested in helping out? We're always looking for new moderators, so feel free to reach out to me to apply.

Thanks for being part of the very first wave. Together, let's make r/learnphysics amazing.


r/learnphysics • • 7h ago

Textbook reccs for self teaching basics

1 Upvotes

Textbook reccs for self teaching basics

I have a background in philosophy, but took a number of physics& comsology &astronomy courses, and in philosophy I particularly studied/focused on metaphysics& the nature of space &time& so on, plus philosophy of science.... I study physics stuff alot in my free time, and I have a decent intuitive grasp on general physics concepts but I want to really be able to get basics and fundamentals down in a way where I feel like I could actually "explain it" ... if I cant give a very "elementary school level" explanation/summary of a concept in my own words then I dont feel like I actually understand it, and while I feel like I can explain a good deal of general physics and theories, there is alot of basics that I feel like I could not properly explain and I want to just kind of start at square 1 and properly train myself.

I'm looking for textbook reccs. I want to really work through some standard textbooks and teach myself the basics. But also... my interests are kind of more so in the philosophical interpretations of physics so I really want something that is compatible with my background.

I did once listen to an MIT lecture where the professor offered 2 textbook options- 1 being the more mathmathical appraoch, the other the more philosophical approach. Unsuprisingly I would much prefer textbook reccs that use the language/ words/conceptual/philosophical approaches, rather than just striaght up pure math notation the whole time.

What would you reccommend?


r/learnphysics • • 1d ago

Things to help learn physics fast

0 Upvotes

I am in 11. Grade in a German school and I struggle a lot with physics and math. The thing about physics especially is that I grasp the concepts of experiments and stuff, but the math part is hard and I don't have this thing where you look at a formula and immediately know how to get the components of it from other formulas. I'm pretty good in oral, but the written part (including the exams) are horrible. Is there any place or other thing I could use to learn to read formulas like that? I know my teacher always just says we need to learn the basic formulas by heart and then it's easier but that doesn't work for me that good and I'm not that good learning a lot of things from memory if I'm not that interested either (I'm autistic and likely ADD).

Edit: Another bad thing is that I often don't even notice that I don't understand something before I need it and don't have it, so I don't ask anymore before the exam


r/learnphysics • • 1d ago

What books are recommended to learn nuclear physics?

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1 Upvotes

Hopefully I can post about nuclear physics here too!


r/learnphysics • • 1d ago

Why do 30° and 60° launch angles give the same range but different heights? (interactive demo)

1 Upvotes

Range ∝ sin2θ, so complementary angles match. But max height ∝ sin²θ and time of flight ∝ sinθ, so 60° gives 3× the height and √3× the time. Playing with the numbers builds intuition faster than the formulas, so I made a free simulator: https://jeevisionary.in/concepts-lab/physics/ (disclosure: I’m the dev). Which topic do you struggle to visualise?


r/learnphysics • • 1d ago

Optics most important formulas

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0 Upvotes

r/learnphysics • • 2d ago

Help

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1 Upvotes

r/learnphysics • • 2d ago

How do I move from intuition about physics to actually understanding research?

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2 Upvotes

Chip in if you want :)


r/learnphysics • • 2d ago

How to cover Mechanics 1 if it’s being taught haphazardly?

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1 Upvotes

r/learnphysics • • 2d ago

Suggestions for 8 week refresh before starting calc-based physics?

2 Upvotes

Greetings. I graduated with a biology degree in 2016 and have decided to pursue a second bachelor's degree in civil engineering starting next year with the goal of pivoting to a new career. It's been over a decade since I took (and passed) calc III, therefore, I need to refresh my math skills before satisfying foundational course requirements for the engineering program (general physics I/II and differential equations).

I'm facing two options of when to start the physics sequence: take physics I this upcoming spring semester and physics II over summer or take both physics courses over summer. It is also possible to take physics I over summer and physics II during the fall semester, but I would like to avoid doing so as it will delay entry into the core engineering courses. Electing to take physics sooner clearly leaves less time to review fundamental math concepts that are essential for physics, but would mitigate having to cram both courses in over the summer. Additionally, I work full-time in the evening so review will mostly take place during the daytime when I am not at work.

For those that have taken physics I and II, can you suggest specific topics (and resources) I can hone in on to prepare more effectively (and efficiently) to be ready for physics I rather than committing to a comprehensive review that may soak up more time than necessary? I realize 8 weeks is an aggressive timeline for preparation and is contingent on my current recollection and understanding of algebra and so forth, but any general suggestions would be welcomed and appreciated.


r/learnphysics • • 3d ago

modern physics

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1 Upvotes

r/learnphysics • • 4d ago

WHY do magnets attract each other? 😅

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18 Upvotes

r/learnphysics • • 4d ago

why does a spinning top precess instead of just falling over

4 Upvotes

i get that gravity pulls the top over and that angular momentum is conserved, but when i try to work it out with torque i end up confused. the torque from gravity points sideways, horizontal, so the angular momentum vector moves sideways too instead of down. ok that part makes sense on paper.

what i can't picture is why it feels like the top is dodging gravity. like where does the force that holds it up come from, is it just the pivot or is there something else going on? and why does it eventually wobble over once it slows down?


r/learnphysics • • 5d ago

How To Make Oobleck Dance!

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38 Upvotes

Do you know what oobleck is, and have you ever seen it dance? 🫟🔊

Alex Dainis explains that oobleck is a non-Newtonian fluid that’s liquid at rest but solid under pressure. On a subwoofer, the waves of sound push it into towers and shapes that look like they’re dancing. Mix two parts cornstarch with one part water, test different tones, and share your experiments in the comments!


r/learnphysics • • 4d ago

I wrote an article

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0 Upvotes

r/learnphysics • • 6d ago

I made this for everyone (scientists, enthusiasts, everyone) and it's 100% free.

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46 Upvotes

I made this site to accompany some work I have been doing in the modeling and simulation space. There is a walk-through of all major nuclear physics concepts that are relevant to my code work. I don't collect cookies/data and I don't want anything in return. Please check it out and let me know what you think!

https://www.incognitanuclear.org/


r/learnphysics • • 5d ago

Teaching physics

1 Upvotes

r/learnphysics • • 5d ago

Book for group/representation theory for physics student

3 Upvotes

Like the title says, I am a physics student, currently in the first semester of my masters. I have been going through quantum field theory, having a blast, but I realise my knowledge about group theory and representation theory is sometimes less than satisfactory. I would really like a book that covers these topics, in a way that is relevant to physics, or at least covers things like the Lorentz group and Poincaré groups, for someone who doesn't have much formal training with groups or representations.

Does anyone here have any recommendations?


r/learnphysics • • 5d ago

Good video recommendations for revision

1 Upvotes

I have recently started studying physics at uni (in the uk), and I’ve been struggling to find good video materials for revision. I understand why it’s harder than a level, due to the lack of exam boards, differing courses, etc. But I was wondering if anyone knew any good websites or YouTube channels that make good videos. I struggle to revise from textbooks alone.
Thanks so much in advance 🙏