r/Physics vs r/AskPhysics

Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.

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Physics community vs AskPhysics Q&A room

r/Physics’s public description is for physicists and physics students, with homework questions disallowed and a wiki for common questions.

Physics is larger (about 3.3M, rank #320) than AskPhysics (about 1.6M, rank #669). Recent activity shows AskPhysics posting more often (~39 posts/day vs ~20). Physics’ sample mixes text with some images/links and uses question, image, video, meta and news flairs; AskPhysics’ sample is mostly text plus some links. Our directory lists each name among the other’s related communities.

Rule titles: Physics bans homework, unscientific content, sensational titles, memes and duplicates; AskPhysics bans irrelevance and rudeness, forbids cheating, requires showing your own attempt and bans AI/LLM drivel.

Choose r/Physics for physicist/student community posts under its no-homework and no-meme rules.
Choose r/AskPhysics for specific physics questions that show your own attempt under its anti-cheating rules.
Both sit outside the current Top 100 cut; science-vs-askscience is a related pattern on another curated page.

Written comparison based on public descriptions and rule titles · updated 2026-11-07.

r/Physics

Physics

For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.

Members: 3.3M
7-day growth: +996
Posts/day: 20.3
Directory rank: #320
Created: Mar 16, 2008
Submissions: Text or links

Sample mix: text posts 67%, images 12%, links 10%

Topics: Physics

Rule titles (short names we collected)

No homework questions
No unscientific content
No sensationalist titles
No meme/image posts
No duplicate posts
Use weekly threads

Open r/Physics on SubMouse

r/AskPhysics

Ask Physics

No public description in our directory.

Members: 1.6M
7-day growth: +1.1K
Posts/day: 38.8
Directory rank: #668
Created: Sep 8, 2011
Submissions: Text posts

Sample mix: text posts 89%, links 11%

Topics: Explanations & Q&A, Physics

Rule titles (short names we collected)

Irrelevance
Rudeness
No cheating on schoolwork, and show your own attempt
Questions that went unanswered for a day
No AI/LLM drivel

Open r/AskPhysics on SubMouse

Supported differences

Aspect	r/Physics	r/AskPhysics
Public focus (from each community’s public description)	For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.	n/a
Size r/Physics is larger in our directory (about 2.1×).	3.3M members	1.6M members
Posting activity (our sample)	20.3/day	38.8/day
Common post types in our sample	text posts 67%, images 12%, links 10%	text posts 89%, links 11%
Allowed submission type (meta)	Text or links	Text posts
Topic tags on SubMouse	Physics	Explanations & Q&A, Physics
Selected rule titles (short names we collected)	No homework questions; No unscientific content; No sensationalist titles; No meme/image posts; No duplicate posts	Irrelevance; Rudeness; No cheating on schoolwork, and show your own attempt; Questions that went unanswered for a day; No AI/LLM drivel

What they share

Shared SubMouse topics: Physics
Our directory lists each of these communities on the other’s related list.

Rules and posting patterns we can verify

Physics short titles include: no homework questions; no unscientific content; no sensationalist titles; no meme/image posts; no duplicate posts; use weekly threads. Common flairs include question, image, video, meta and news.

AskPhysics: irrelevance; rudeness; no cheating on schoolwork, and show your own attempt; questions that went unanswered for a day; no AI/LLM drivel. Recent posts are text-forward with some links.

Where this comparison comes from

Public titles, descriptions (where present) and member counts from SubMouse’s safe-for-work directory. Mutual related-list links. Short titles only.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-09 UTC); 7-day growth measured from 2026-11-02. Posts/day and post types are shown where recent activity is available. Rule lines are short titles, not the full sidebar. Directory rank is listing order.