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, meta, video, 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
: "How did your pov on life change after learning physics? If at all."
65 posts
#2
Image
: "Any explanation on this chalk build up?"
20 posts
#3
Meta
: "Textbooks & Resources - Weekly Discussion Thread - June 12, 2026"
7 posts
#4
Video
: "Synthetic prequantum field theory in a cohesive homotopy topos --- Urs Schreiber"
3 posts
#5
News
: "Researchers have unlocked a breakthrough in electron microscopy—revealing the body’s smallest proteins at ~10,000× the magnification of optical light microscopes. This resolution could transform understanding of disease at the molecular level."
2 posts
#6
Academic
: "New DESI Analysis Weakens Tension"
2 posts
#7
Article
: "The Glass Library - 10,000 Years of Data on One Piece of Glass"
1 post
Member Growth in r/Physics
Yearly
+70k members(2.2%)
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About
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Last updated: July 1, 2026