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Participate in expert physics discussion. Discussion on the nature and properties of matter and energy. This area is for topics that don't fit the other categories. Mainstream physics only.
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Insights How to Avoid Breaking Physics With Your “What If” Question
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15K
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Graduate List of credible physics journals
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5
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19K
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Insights How to Better Define Information in Physics - Comments
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9
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Undergrad Physics FAQs: All Your Questions Answered
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17K
Undergrad What are the speed limits of a maglev track?
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4
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366
Undergrad What causes knots and stress when untwisting ropes?
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8
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  • Redirect
Undergrad Black hole questions
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High School What is "motion theory?"
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3
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265
Graduate RIP Chen Ning Yang (1922-2025)
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7
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Insights Thinking Outside The Box Versus Knowing What’s In The Box
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2
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35
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Graduate What researchers think of the Coriolis force
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4
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1K
Undergrad Why Does Snow Pack Better Near the Melting Point?
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6
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170
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24K
Undergrad Should the Unit of Momentum Be Named After Emmy Noether?
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36
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High School Is there anything in the Universe that is not fundamentally made up of matter?
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3
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4K
Question about what is in the Universe
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15
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773
Undergrad Questions about bubble behaviour
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9
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2K
Undergrad Spectrometer of James Webb Space Telescope
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9
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877
High School Individual photons or electrons on a screen?
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17
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High School Mechanism behind the generation of tiny bright spots
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17
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1K
Undergrad Why is SI taught in US university physics courses instead of cgs?
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22
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1K
Undergrad A high school physics problem demonstrating relative motion
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6
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1K
Undergrad Solid State Physics and Chameleon Color Changes
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0
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1K
Graduate Unsolved Problems in Near Surface Geophysics
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4
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3K
Graduate Looking for learning resources for Clifford Algebra
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1
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761
High School Audio frequency of a humidifier
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12
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Graduate Variations on Sacharov's problem
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6
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953
New person here, where do I post my own personal hypothesis?
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15
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Graduate Predictions for the Nobel Prize in Physics 2025 (results: John Clarke, Michel H. Devoret and John M. Martinis)
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2
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37
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6K
Graduate RIP Daniel Kleppner (1932-2025)
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4
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1K
Best physics magazines?
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1
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765
Einstein vs Newton - Who is your favorite and why?
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28
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Graduate To get rid of a singularity in the Lagrange equations
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11
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News RIP Kenneth Nordtvedt
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1
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852
Graduate APS's 2026 W.K.H. Panofsky Prize!
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1
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879
High School Opposite law propose
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2
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1K
High School How do walk-in freezers not give people hypothermia? [they do]
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13
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High School States of matter: "viscoelastic fluid", familiar term is "cream"
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5
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861
Graduate RIP John Stachel (1928-2025)
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Graduate Could the Laws of Physics Be Proportional to Entropy?
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Graduate Complexity Physics and Tipping Points in Chess
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22
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Graduate RIP Mary Gaillard (1939-2025)
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3
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Graduate RIP George F. Smoot III (1945-2025)
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Undergrad Raman Spectroscopy help
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852
A Big Thank You to Physics Forums
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James Hartle RIP: Remembering a Beloved GR Teacher
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5
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High School Why can't Solar panels be hemispherical, or a curved strip type?
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Graduate RIP Rainer Weiss (1932-2025)
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Graduate How do people explore new ideas in physics?
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2
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52
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Undergrad I need to simulate clothing meshes for hanging garments
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3
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High School Gravity in science fiction movies
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16
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Graduate RIP Jayant Narlikar (1938-2025)
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1
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1K
Graduate AI vs. German Physics Olympiad
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5
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1K
Undergrad Physics inserted in society
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5
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Seeking Interested Physicists
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2
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R.I.P. Sir Francis Graham-Smith 1923- 2025
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Graduate Speculative theory
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2
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Dr. Eddie Boyes' Youtube videos on Quantum Entanglement
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3
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High School Development of computer chips cooling
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4
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Graduate RIP Edwin F Taylor (1931-2025)
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3
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2K
Graduate Using AI to evaluate white papers?
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2
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42
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Graduate Publishing Physics Without Institution: Any Tips?
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2
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40
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Undergrad Why weather apps show absolute pressure?
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18
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Undergrad 'Set of pearls' mathematics / physics help
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8
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Graduate Thought Experiment: "A Glimpse into Infinity"
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1
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1K
Drake Equation/Fermi Paradox vs. Hubble/JWST
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4
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High School Name or Label for the outermost point of a rotating object
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3
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News Gerard't Hooft Interview
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6
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3K
  • Poll Poll
Poll: For physics and math, Notebook vs Loose leaf papers
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2
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Undergrad What can be used as a Frequency generator to make Chladni patterns?
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3
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Undergrad How Can I Build a DIY High Vacuum System Using Copper Instead of Glass?
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5
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High School Looking for info on old, unlabeled Geissler tubes
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16
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Undergrad Landau golden list
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2
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Graduate Veritasium Videos we all want (maybe)
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4
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Graduate RIP Basil Hiley (1935–2025)
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3
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High School The satellite and its work done
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2
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Undergrad The work done by an artificial satellite
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4
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Graduate Trying to understand the meaning of "Sum Rules"
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6
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Rather interesting Physics Olympiad poster
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5
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Undergrad Are there reflections in the fourth dimension?
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4
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Flawed Artist's Renditions of Cosmological Events
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3
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Graduate Can the radio noise of a civilization decrease over time?
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6
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Undergrad Cloud seeding and firefighting
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11
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Graduate RIP Leon N Cooper (1930 - 2024) - Nobel 1972
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News Wasn't Parker Solar Probe about to resume communication with Earth?
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  • Poll Poll
Graduate Theory Of Everything (ToE)
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27
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Why are the paths of our cosmic explorations pretty?
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16
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High School Explanations about Kardashev type 1 civilizations
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7
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Static electricity (like tree lightning) on my ceiling?
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24
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Undergrad AI Predicting Physics Research Results
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1
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Shout out to my HS Science teacher from 10 years ago
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2
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Graduate Predictions for Physics Nobel Prize 2024 (and the results)
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2
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37
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Undergrad Airflow through an air extraction grill
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3
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Graduate What is a less painful way to study Lagrangian Mechanics?
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4
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High School How do I keep my room cool when my housemate wants the heating on?
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15
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Undergrad Direct and alternating current, a personal approach to understand them
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1
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Is This Year's Physics Nobel on Advances in AI Physics?
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1
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1K
High School Lottery physics: ball placement and positions in lottery games
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12
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9K
Physics has taken the wrong turn
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20
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Graduate How much funding/resources are spent in string theory research?
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14
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3K
Undergrad Why does my ceiling glow in the dark?
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12
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Graduate Supporting neurodivergent talent: ADHD, autism, and dyslexia in physics and space sciences
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21
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Shroedinger's Cat, New Yorker Cartoon
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2
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2K
High School Wi-Fi Interference: How Microwaves Can Affect Your Wireless Connection
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25
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7K
High School Question about sig figs and rounding: How to handle when there are 2 parts to the problem?
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13
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4K