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 82K 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: 66K members
Past year (monthly)
- 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: 5K 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
- Question28 posts in the past month
- Is there a sense in which gauge fields have no spin?
- Is self teaching physics truly possible?
- Want to hear what it's like to research soft condensed matter physics?
#128QuestionIs there a sense in which gauge fields have no spin? · Is self teaching physics truly possible? · Want to hear what it's like to research soft condensed matter physics? - Image9 posts in the past month
- I built Lattiva — a free atomic structure viewer for iPhone, iPad, and Mac (planning to open-source it)
- Can perpendicular waves cancel out each-other? sound waves specifically.
- I had synced time on both of them to the second about a week ago, now I'm confused whether my wrist watch is 2 seconds faster or the internet coordinated time on my tablet is 2 seconds slower
#29ImageI built Lattiva — a free atomic structure viewer for iPhone, iPad, and Mac (planning to open-source it) · Can perpendicular waves cancel out each-other? sound waves specifically. · I had synced time on both of them to the second about a week ago, now I'm confused whether my wrist watch is 2 seconds faster or the internet coordinated time on my tablet is 2 seconds slower - Video4 posts in the past month
- Gravitational billiard in a circle
- Jump from the Moon to the Earth (A Real Physics Simulation)
- How Does The Speed of Light Change?
#34VideoGravitational billiard in a circle · Jump from the Moon to the Earth (A Real Physics Simulation) · How Does The Speed of Light Change? - Meta3 posts in the past month
- Textbooks & Resources - Weekly Discussion Thread - October 30, 2026
- Physics Questions - Weekly Discussion Thread - October 27, 2026
- Careers/Education Questions - Weekly Discussion Thread - October 29, 2026
#43MetaTextbooks & Resources - Weekly Discussion Thread - October 30, 2026 · Physics Questions - Weekly Discussion Thread - October 27, 2026 · Careers/Education Questions - Weekly Discussion Thread - October 29, 2026
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
- 43
- Views /mo (+34%)
- 40
- Visitors /mo (+38%)
- 6
- Referrals /mo (0%)
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