r/Physics
3.3M members
r/Physics is a subreddit with 3.3M members. The community frequently discusses physics, quantum, looking for, struggling, and theory, and they frequently recommend/review physics books, coding language, and simulation software, and the most common flair used is question, image, video, and meta.
For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.
Popular Topics in r/Physics
#1
Physics
280 posts
#2
Quantum
35 posts
#3
Looking For
25 posts
#4
Struggling
23 posts
#5
Theory
20 posts
#6
Time
17 posts
#7
Force
15 posts
#8
Energy
13 posts
#9
Struggle
12 posts
#10
Frustrating
12 posts
Products Discussed in r/Physics
Physics Books
83 reviews
#1
Young and Freedman
4.4★ from 8 reviews
#2
Richard Feynman
4.9★ from 7 reviews
#3
David J. Griffiths
4.0★ from 6 reviews
Coding Language
40 reviews
#1
Python
4.9★ from 17 reviews
#2
Julia
4.8★ from 8 reviews
#3
Fortran
4.9★ from 7 reviews
Simulation Software
9 reviews
#1
Geant4
3.0★ from 1 review
#2
Python
5.0★ from 1 review
#3
SimPy
4.0★ from 1 review
Flair Used in r/Physics
#1
Question
: "Is there a sense in which gauge fields have no spin?"
28 posts
#2
Image
: "I built Lattiva — a free atomic structure viewer for iPhone, iPad, and Mac (planning to open-source it)"
9 posts
#3
Video
: "Gravitational billiard in a circle"
4 posts
#4
Meta
: "Textbooks & Resources - Weekly Discussion Thread - October 30, 2026"
3 posts
Member Growth in r/Physics
Yearly
+82k members(2.6%)
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Last updated: October 31, 2026