r/Physics

Community Overview
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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 3.2M members. It uses a forum format for communication. On the Hive Index it ranks #2 in the Physics communities list.

Roughly 77K members have joined in the past year. Popular discussion topics include Physics, Quantum, and Looking For. Product recommendations often mention books and universities.

On Reddit
3.2M Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +77K members
Growth: +2.4% / year

Member 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: 55K members

Past year (monthly)

  • Oct: 3K members
  • 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

Topics

  • Physics
    280 posts in the past month
    #1
    Physics
    280
  • Quantum
    35 posts in the past month
    #2
    Quantum
    35
  • Looking For
    25 posts in the past month
    #3
    Looking For
    25
  • Struggling
    23 posts in the past month
    #4
    Struggling
    23
  • Theory
    20 posts in the past month
    #5
    Theory
    20

Flair

  • Question
    52 posts in the past month
    1. Do scientists know whether nature is fundamentally continuous or discrete?
    2. Can I call myself a physicist?
    3. Is Physics Stack Exchange already dead?
    #1
    Question
    Do scientists know whether nature is fundamentally continuous or discrete? · Can I call myself a physicist? · Is Physics Stack Exchange already dead?
    52
  • Image
    22 posts in the past month
    1. 150 years of the particle physics energy frontier
    2. Dew not collecting in one specific spot on my windshield- explain like I'm 5.
    3. Double Slit Single Photon Question
    #2
    Image
    150 years of the particle physics energy frontier · Dew not collecting in one specific spot on my windshield- explain like I'm 5. · Double Slit Single Photon Question
    22
  • Meta
    6 posts in the past month
    1. Careers/Education Questions - Weekly Discussion Thread - August 20, 2026
    2. Physics Questions - Weekly Discussion Thread - August 25, 2026
    3. Physics Questions - Weekly Discussion Thread - August 18, 2026
    #3
    Meta
    Careers/Education Questions - Weekly Discussion Thread - August 20, 2026 · Physics Questions - Weekly Discussion Thread - August 25, 2026 · Physics Questions - Weekly Discussion Thread - August 18, 2026
    6
  • Article
    4 posts in the past month
    1. Theory of fluids enters the 21st century: "symmetries over substance", EFTs, and the Wilsonian RG
    2. The Doppler Effect: How Radar Actually Measures Velocity
    3. Webinar - Hanno Rein: How to simulate the Solar System and find out if it is stable
    #4
    Article
    Theory of fluids enters the 21st century: "symmetries over substance", EFTs, and the Wilsonian RG · The Doppler Effect: How Radar Actually Measures Velocity · Webinar - Hanno Rein: How to simulate the Solar System and find out if it is stable
    4
  • News
    3 posts in the past month
    1. Milky Way's fastest star orbits our supermassive black hole so closely it feels its spin
    2. Twisted Physics: Astronomers Solve 30-Year-Old Stellar Mystery - National Radio Astronomy Observatory
    3. Physicists solve 40-year-old magnetic mystery
    #5
    News
    Milky Way's fastest star orbits our supermassive black hole so closely it feels its spin · Twisted Physics: Astronomers Solve 30-Year-Old Stellar Mystery - National Radio Astronomy Observatory · Physicists solve 40-year-old magnetic mystery
    3

Product recommendations

  • books
    10 posts in the past month
    1. Best books for undergrad quantum mechanics
    2. Best history of physics or physics adjacent books/videos/etc?
    3. Books to recommend for someone catching up with theoretical physics.
    #1
    books
    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.
    10
  • universities
    3 posts in the past month
    1. Best US universities for High Energy Theory
    2. which universities in the UK provide the best physics courses
    3. 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.
    #2
    universities
    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.
    3
View full analysis on GummySearchSynced 8/29/2026

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 3.2M 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.
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Added 7/3/2023

Monthly Stats

26
Views /mo
(+53%)
23
Visitors /mo
(+109%)
4
Referrals /mo
(+300%)

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