Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.
Swap sides New comparison Related to r/AskPhysics Related to r/Physics
r/Physics’s public description is for physicists and physics students, with homework questions disallowed and a wiki for common questions. r/AskPhysics’s directory title is Ask Physics; a longer public description was n/a in our snapshot.
In our directory, Physics is larger (about 3.3M, rank #320) than AskPhysics (about 1.6M, rank #669). Activity samples show 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.
Written comparison based on public descriptions and rule titles · updated 2026-11-07.
No public description in our directory.
Sample mix: text posts 89%, links 11%
Topics: Explanations & Q&A, Physics
Rule titles (short names we collected)
For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed.
Sample mix: text posts 69%, images 11%, links 10%
Topics: Physics
Rule titles (short names we collected)
About this community: r/Physics (#320, about 3.3 million) is for physicists and physics students—see wiki for common questions; basic homework not allowed. Rules: no homework, unscientific content, sensational titles, meme/image posts, or duplicates; use weekly threads. Text/Image (~20.1 ppd).
| Aspect | r/AskPhysics | r/Physics |
|---|---|---|
| Public focus (from each community’s public description) | n/a | For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed. |
| Size r/Physics is larger in our directory (about 2.1×). |
1.6M members | 3.3M members |
| Posting activity (our sample) | 38.8/day | 20.1/day |
| Common post types in our sample | text posts 89%, links 11% | text posts 69%, images 11%, links 10% |
| Allowed submission type (meta) | Text posts | Text or links |
| Topic tags on SubMouse | Explanations & Q&A, Physics | Physics |
| Selected 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 | No homework questions; No unscientific content; No sensationalist titles; No meme/image posts; No duplicate posts |
Physics short titles include: no homework questions; no unscientific content; no sensationalist titles; no meme/image posts; no duplicate posts; use weekly threads. Our sample 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. Our sample is text-forward with some links.
Public titles, descriptions (where present) and member counts from SubMouse’s safe-for-work directory. Short rule titles and activity samples SubMouse collected. Mutual related-list links. Short titles only. AskPhysics public description: n/a in our snapshot.
Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and post-type mixes appear when we have an activity sample. Rule lines are short titles, not the full sidebar. Directory rank is listing order — communities outside the current Top 100 open in the info tool instead of a full community page.
Hand-written explanations for pairs where the public descriptions and rules support a real distinction: