r/Physics
3.2M members
r/Physics is a subreddit with 3.2M 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, meta, and news.
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
: "So, regarding Navier-Stokes, a naive question: do we need to restate the problem?"
46 posts
#2
Image
: "Hydrogen Orbital Visualizer"
15 posts
#3
Video
: "Illustrating how issues with floating-point precision cause the butterfly effect in a laser simulation"
8 posts
#4
Meta
: "Careers/Education Questions - Weekly Discussion Thread - September 03, 2026"
7 posts
#5
News
: "LZ Sees Surprising Result in Search for Dark Matter"
4 posts
#6
Academic
: "Information geometry approach to quantum stochastic thermodynamics"
3 posts
Member Growth in r/Physics
Yearly
+79k members(2.5%)
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About
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Last updated: September 13, 2026