Compare Subreddits

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.

Swap sides New comparison Related to r/Physics Related to r/AskPhysics

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. 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.

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: +1.1K
Posts/day: 20.1
Directory rank: #320
Created: Mar 16, 2008
Submissions: Text or links

Sample mix: text posts 69%, images 11%, 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

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).

r/AskPhysics

Ask Physics

No public description in our directory.

Members: 1.6M
7-day growth: +966
Posts/day: 38.8
Directory rank: #669
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)	20.1/day	38.8/day
Common post types in our sample	text posts 69%, images 11%, 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. 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.

Where this comparison comes from

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.

Comparisons we prepared

Hand-written explanations for pairs where the public descriptions and rules support a real distinction:

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r/SkincareAddiction vs r/AsianBeauty — Science-leaning general skincare versus Asian beauty brands and routines.
r/Fitness vs r/bodyweightfitness — General gym-and-goals fitness discussion versus training with bodyweight progressions.
r/loseit vs r/Fitness — Sustainable weight-loss support versus general physical fitness goals and training.
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r/history vs r/AskHistorians — Casual history discussion and articles versus strictly moderated historical Q&A.
r/news vs r/worldnews — US-and-world news articles versus major world news that excludes US-internal stories.
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r/BuyItForLife vs r/Frugal — Durable long-life products versus everyday frugality and resourcefulness.
r/Parenting vs r/Mommit — All-parents child-rearing discussion versus a moms-only support room for the messier details.
r/LifeProTips vs r/YouShouldKnow — Actionable life tips versus facts framed as things you should know.
r/camping vs r/backpacking — Tent and campsite camping versus wilderness or travel backpacking with trip write-ups.
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r/technology vs r/gadgets — Technology news and surrounding issues versus posts about a single gadget.
r/food vs r/EatCheapAndHealthy — Original food photography versus budget-friendly healthy recipes with text.
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r/slowcooking vs r/Cooking — Crock-Pot style slow-cooker recipes versus general cooking discussion and recipes.
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r/cars vs r/MechanicAdvice — Enthusiast news and projects versus repair troubleshooting help.
r/Python vs r/learnpython — Python language hub versus learner Q&A helpdesk.
r/Jokes vs r/dadjokes — General joke threads versus dad-joke puns and groaners.
r/mildlyinteresting vs r/interestingasfuck — Quietly notable original photos versus content that aims to be truly striking.
r/Futurology vs r/technology — Evidence-leaning futures discussion versus technology news and surrounding issues.
r/movies vs r/television — Film news and discussion versus scripted television programming talk.
r/LifeProTips vs r/lifehacks — Actionable LPT-format advice versus uncommon physical-style life hacks.
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r/dating vs r/dating_advice — General dating discussion and venting versus situation-specific dating advice.
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r/offmychest vs r/TrueOffMyChest — Supportive emotional sharing versus a stricter personal off-my-chest format.
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r/MadeMeSmile vs r/UpliftingNews — Feel-good images and videos versus positive news article links.
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r/Damnthatsinteresting vs r/interestingasfuck — High-interest media shares versus “interesting as fuck” media shares—overlapping curiosity feeds with different rule bars.
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r/soccer vs r/PremierLeague — Global football news and discussion versus English Premier League focus.
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r/sidehustle vs r/Entrepreneur — Extra income beside a full-time job versus broader entrepreneurship and startup talk.
r/careerguidance vs r/jobs — Career-path questions and advice versus job-search, interview and workplace threads.
r/legaladvice vs r/law — Personal legal questions versus news and discussion of the legal profession.
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