About r/Physics
For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.
The community at a glance
r/Physics is a Subreddit for Physics with roughly 3.3M members. It uses a forum format for communication. On the Hive Index it ranks #1 in the Physics communities list.
Roughly 80K members have joined in the past year. Popular discussion topics include Physics, Quantum, and Looking For. Product recommendations often mention books and universities.
Community Topics
Community Features
This community has a forum
Subreddit Analysis
via GummySearchMember growth over time
All time (yearly)
- 2013: 23K members
- 2014: 24K members
- 2015: 13K members
- 2016: 28K members
- 2017: 95K members
- 2018: 358K members
- 2019: 388K members
- 2020: 602K members
- 2021: 229K members
- 2022: 286K members
- 2023: 325K members
- 2024: 548K members
- 2025: 208K members
- 2026: 63K members
Past year (monthly)
- Nov: 8K members
- Dec: 8K members
- Jan: 8K members
- Feb: 7K members
- Mar: 6K members
- Apr: 7K members
- May: 7K members
- Jun: 7K members
- Jul: 6K members
- Aug: 6K members
- Sep: 5K members
- Oct: 2K members
Topics
- Physics280 posts in the past month#1280Physics
- Quantum35 posts in the past month#235Quantum
- Looking For25 posts in the past month#325Looking For
- Struggling23 posts in the past month#423Struggling
- Theory20 posts in the past month#520Theory
Flair
- Question32 posts in the past month
- What physics concept was hardest to understand until you saw it visualized?
- What are your predictions for this year's Nobel prize?
- What is the acceleration due to gravity (g) in essence?
#132QuestionWhat physics concept was hardest to understand until you saw it visualized? · What are your predictions for this year's Nobel prize? · What is the acceleration due to gravity (g) in essence? - Image12 posts in the past month
- 30s | Preparing for a Physics PhD — Seeking online friends for regular study check-ins
- Doubt
- Using AI to code H-R diagram from Gaia DR3
#212Image30s | Preparing for a Physics PhD — Seeking online friends for regular study check-ins · Doubt · Using AI to code H-R diagram from Gaia DR3 - Video2 posts in the past month
- I made a video asking Fields Medalist Richard Borcherds why 4D quantum field theory is not mathematically rigorous and why string theory has so many coincidences
- Lecture 3 - Statics - Chapter 3 Equilibrium of Particles 3.1 and 3.2
#32VideoI made a video asking Fields Medalist Richard Borcherds why 4D quantum field theory is not mathematically rigorous and why string theory has so many coincidences · Lecture 3 - Statics - Chapter 3 Equilibrium of Particles 3.1 and 3.2 - Meta2 posts in the past month
- Textbooks & Resources - Weekly Discussion Thread - September 25, 2026
- Physics Questions - Weekly Discussion Thread - September 29, 2026
#42MetaTextbooks & Resources - Weekly Discussion Thread - September 25, 2026 · Physics Questions - Weekly Discussion Thread - September 29, 2026 - Academic1 post in the past month
- Morgensztern, Cota and Mininno introduce Solver Agent, and open source Agentic AI framework they used to attack a challenging geometric problem in string theory
#51AcademicMorgensztern, Cota and Mininno introduce Solver Agent, and open source Agentic AI framework they used to attack a challenging geometric problem in string theory
Product recommendations
- books10 posts in the past month
- Best books for undergrad quantum mechanics
- Best history of physics or physics adjacent books/videos/etc?
- Books to recommend for someone catching up with theoretical physics.
#110booksBest books for undergrad quantum mechanics · Best history of physics or physics adjacent books/videos/etc? · Books to recommend for someone catching up with theoretical physics. - universities3 posts in the past month
- Best US universities for High Energy Theory
- which universities in the UK provide the best physics courses
- If you had no limitations and all schools were a possibility…Besides MIT what Universities on the East Coast of the USA would you recommend or attend for physics, astrophysics, math.
#23universitiesBest US universities for High Energy Theory · which universities in the UK provide the best physics courses · If you had no limitations and all schools were a possibility…Besides MIT what Universities on the East Coast of the USA would you recommend or attend for physics, astrophysics, math.
Community Reviews
Frequently asked questions
- Who is r/Physics for?
- Best for Physics enthusiasts looking for a Reddit-based community with forum discussion.
- Is r/Physics free to join?
- This listing is not marked as paid-only. Access rules and any fees are decided by the community.
- How many members does r/Physics have?
- Roughly 3.3M members, based on figures reported by the community or its host. Member counts are approximate and change over time.
- What platform is r/Physics on?
- r/Physics runs on Reddit. Reddit communities (or "subreddits") are forum-based groups on the popular social news aggregation, web content rating, and discussion website Reddit. Reddit is commonly known as "the front page of the internet". Users submit content to the site such as links, text posts, and images, which are then voted up or down and discussed by other members. From investing Reddit communities, to professional ones, to ones just for laughs, you're likely to find a community for you on Reddit.
- What topics does r/Physics cover?
- On the Hive Index, r/Physics is organized under Physics.
- How do I join r/Physics?
- You can join r/Physics by clicking this link, or pressing the "Go to community" button above.
- What are the Physics communities like?
- Communities for physics students, enthusiasts, and professionals covering classical mechanics, quantum physics, relativity, and more. Facebook groups host educational content, Discord science servers mix physics with adjacent fields, and Reddit has communities for both homework help and deeper theoretical discussion.
Monthly Stats
- 38
- Views /mo (+58%)
- 34
- Visitors /mo (+48%)
- 8
- Referrals /mo (+700%)
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