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. It is the 1st largest community in the Physics topic page.

Roughly 67K 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: +67K members
Growth: +2.1% / 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: 38K members

Past year (monthly)

  • Jul: 2K members
  • Aug: 2K members
  • Sep: 2K members
  • 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: 2K 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
    56 posts in the past month
    1. Exactly how great was Euler?
    2. Am I really missing out by not using AI for coding?
    3. What would you do with a $5m grant, no strings?
    #1
    Question
    Exactly how great was Euler? · Am I really missing out by not using AI for coding? · What would you do with a $5m grant, no strings?
    56
  • Image
    29 posts in the past month
    1. Boyfriend studies physics and got me this
    2. how spinning magnets create curl in magnetic fields
    3. How can one achieve this level of physics knowledge?
    #2
    Image
    Boyfriend studies physics and got me this · how spinning magnets create curl in magnetic fields · How can one achieve this level of physics knowledge?
    29
  • News
    10 posts in the past month
    1. A zero-index waveguide: Researchers directly observe infinitely long wavelengths for the first time
    2. Antihydrogen mirrors hydrogen in upgraded spectrum test, narrowing cosmic mystery
    3. Molecular glasses solve long-standing Arrhenius paradox
    #3
    News
    A zero-index waveguide: Researchers directly observe infinitely long wavelengths for the first time · Antihydrogen mirrors hydrogen in upgraded spectrum test, narrowing cosmic mystery · Molecular glasses solve long-standing Arrhenius paradox
    10
  • Video
    7 posts in the past month
    1. Relativistic Space Invaders
    2. TASI 2026 started and are posting the lectures
    3. Heisenberg, Bohr, and the Rise of Copenhagen | Video essay based on Chapter 2 of "What Is Real?" by Adam Becker | This is my second video in the series, and I’m continuing to refine the format. I’d love additional feedback!
    #4
    Video
    Relativistic Space Invaders · TASI 2026 started and are posting the lectures · Heisenberg, Bohr, and the Rise of Copenhagen | Video essay based on Chapter 2 of "What Is Real?" by Adam Becker | This is my second video in the series, and I’m continuing to refine the format. I’d love additional feedback!
    7
  • Meta
    4 posts in the past month
    1. Textbooks & Resources - Weekly Discussion Thread - June 05, 2026
    2. Textbooks & Resources - Weekly Discussion Thread - May 08, 2026
    3. Careers/Education Questions - Weekly Discussion Thread - May 14, 2026
    #5
    Meta
    Textbooks & Resources - Weekly Discussion Thread - June 05, 2026 · Textbooks & Resources - Weekly Discussion Thread - May 08, 2026 · Careers/Education Questions - Weekly Discussion Thread - May 14, 2026
    4

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 6/9/2026

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

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