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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.
  • Sticky
Insights How to Avoid Breaking Physics With Your “What If” Question
  • phinds
  • · Replies 3 ·
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3
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Graduate List of credible physics journals
  • Greg Bernhardt
  • · Replies 5 ·
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5
  • Sticky
Insights How to Better Define Information in Physics - Comments
  • anorlunda
  • · Replies 9 ·
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9
  • Sticky
Undergrad Physics FAQs: All Your Questions Answered
  • Greg Bernhardt
  • · Replies 0 ·
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0
Graduate A rotating frame equation for the "carousel experiment"
  • Simon F
  • · Replies 26 ·
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26
High School Quantum field theory vs. super string theory?
  • BadgerBadger92
  • · Replies 4 ·
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4
High School Cold fusion
  • Josiah
  • · Replies 5 ·
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5
Undergrad Chua's oscillator circuit -- Intuitive picture
  • Swamp Thing
  • · Replies 47 ·
2
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47
High School Is it possible for matter to be completely destroyed to nothingness
  • TheAquascaper
  • · Replies 3 ·
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3
Graduate Interference with slits of different width
  • weirdoguy
  • · Replies 3 ·
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3
Graduate What researchers think of the Coriolis force
  • Simon F
  • · Replies 5 ·
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5
Undergrad Solid State Physics and Chameleon Color Changes
  • Shahzad Raza
  • · Replies 1 ·
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1
Undergrad New EM spectrum designation between UV and X-rays
  • nightvidcole
  • · Replies 5 ·
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5
High School Buoyancy and gravity
  • TheOldDog
  • · Replies 32 ·
2
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32
Graduate Geometry of Bluetooth Field
  • Twodogs
  • · Replies 10 ·
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10
Undergrad Difficulties in Measuring the Contact Angle of a Sessile Droplet
  • andrewlee123
  • · Replies 5 ·
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5
Insights Thinking Outside The Box Versus Knowing What’s In The Box
  • Greg Bernhardt
  • · Replies 36 ·
2
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36
High School A question about leverage and stability of shelf support
  • confusedlabs
  • · Replies 9 ·
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9
Undergrad What are the speed limits of a maglev track?
  • amorphos_b
  • · Replies 5 ·
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5
Undergrad What causes knots and stress when untwisting ropes?
  • Aurelius120
  • · Replies 8 ·
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8
High School What is "motion theory?"
  • Vectronix
  • · Replies 3 ·
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3
Graduate RIP Chen Ning Yang (1922-2025)
  • robphy
  • · Replies 7 ·
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7
Undergrad Why Does Snow Pack Better Near the Melting Point?
  • Charles Link
  • · Replies 170 ·
6
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170
Undergrad Should the Unit of Momentum Be Named After Emmy Noether?
  • Vanadium 50
  • · Replies 36 ·
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36
High School Is there anything in the Universe that is not fundamentally made up of matter?
  • Amazed
  • · Replies 87 ·
3
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87
Question about what is in the Universe
  • Amazed
  • · Replies 15 ·
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15
Undergrad Questions about bubble behaviour
  • Chiefly
  • · Replies 9 ·
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9
Undergrad Spectrometer of James Webb Space Telescope
  • Julian_M
  • · Replies 9 ·
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9
High School Individual photons or electrons on a screen?
  • johnthekid
  • · Replies 17 ·
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17
High School Mechanism behind the generation of tiny bright spots
  • johnthekid
  • · Replies 17 ·
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17
Undergrad Why is SI taught in US university physics courses instead of cgs?
  • bluepilotg-2_07
  • · Replies 22 ·
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22
Undergrad A high school physics problem demonstrating relative motion
  • wrobel
  • · Replies 6 ·
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6
Graduate Unsolved Problems in Near Surface Geophysics
  • AryaKimiaghalam
  • · Replies 4 ·
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4
Graduate Looking for learning resources for Clifford Algebra
  • JonnyBadFox
  • · Replies 1 ·
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1
High School Audio frequency of a humidifier
  • DaveC426913
  • · Replies 12 ·
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12
Graduate Variations on Sacharov's problem
  • wrobel
  • · Replies 6 ·
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6
New person here, where do I post my own personal hypothesis?
  • Legodudelol9a
  • · Replies 15 ·
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15
Graduate Predictions for the Nobel Prize in Physics 2025 (results: John Clarke, Michel H. Devoret and John M. Martinis)
  • pines-demon
  • · Replies 37 ·
2
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37
Graduate RIP Daniel Kleppner (1932-2025)
  • robphy
  • · Replies 4 ·
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4
Best physics magazines?
  • BadgerBadger92
  • · Replies 1 ·
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1
Einstein vs Newton - Who is your favorite and why?
  • BadgerBadger92
  • · Replies 28 ·
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28
Graduate To get rid of a singularity in the Lagrange equations
  • wrobel
  • · Replies 11 ·
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11
News RIP Kenneth Nordtvedt
  • Jonathan Scott
  • · Replies 1 ·
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1
Graduate APS's 2026 W.K.H. Panofsky Prize!
  • Astronuc
  • · Replies 1 ·
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1
High School Opposite law propose
  • Bendimac16
  • · Replies 2 ·
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2
High School How do walk-in freezers not give people hypothermia? [they do]
  • SpeedOfLightYagami
  • · Replies 13 ·
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13
High School States of matter: "viscoelastic fluid", familiar term is "cream"
  • symbolipoint
  • · Replies 5 ·
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5
Graduate RIP John Stachel (1928-2025)
  • robphy
  • · Replies 2 ·
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2
Graduate Could the Laws of Physics Be Proportional to Entropy?
  • pasulya
  • · Replies 5 ·
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5
Graduate Complexity Physics and Tipping Points in Chess
  • jedishrfu
  • · Replies 22 ·
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22
Graduate RIP Mary Gaillard (1939-2025)
  • robphy
  • · Replies 3 ·
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3
Graduate RIP George F. Smoot III (1945-2025)
  • robphy
  • · Replies 1 ·
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1
Undergrad Raman Spectroscopy help
  • labgirl
  • · Replies 1 ·
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1
A Big Thank You to Physics Forums
  • I_Try_Math
  • · Replies 1 ·
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1
James Hartle RIP: Remembering a Beloved GR Teacher
  • George Jones
  • · Replies 5 ·
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5
High School Why can't Solar panels be hemispherical, or a curved strip type?
  • Aashna4M
  • · Replies 38 ·
2
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Graduate RIP Rainer Weiss (1932-2025)
  • robphy
  • · Replies 1 ·
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1
Graduate How do people explore new ideas in physics?
  • adam_snyder
  • · Replies 52 ·
2
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52
Undergrad I need to simulate clothing meshes for hanging garments
  • AI_Messiah
  • · Replies 3 ·
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3
High School Gravity in science fiction movies
  • wrobel
  • · Replies 16 ·
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16
Graduate RIP Jayant Narlikar (1938-2025)
  • robphy
  • · Replies 1 ·
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1
Graduate AI vs. German Physics Olympiad
  • Hornbein
  • · Replies 5 ·
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5
Undergrad Physics inserted in society
  • montanha18_
  • · Replies 5 ·
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5
Seeking Interested Physicists
  • LShorey
  • · Replies 2 ·
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2
R.I.P. Sir Francis Graham-Smith 1923- 2025
  • pinball1970
  • · Replies 1 ·
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1
Graduate Speculative theory
  • parth
  • · Replies 2 ·
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2
Dr. Eddie Boyes' Youtube videos on Quantum Entanglement
  • FreeThinking
  • · Replies 3 ·
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3
High School Development of computer chips cooling
  • mitro
  • · Replies 4 ·
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4
Graduate RIP Edwin F Taylor (1931-2025)
  • robphy
  • · Replies 3 ·
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3
Graduate Using AI to evaluate white papers?
  • frankinstien
  • · Replies 42 ·
2
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42
Graduate Publishing Physics Without Institution: Any Tips?
  • axiom
  • · Replies 40 ·
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Undergrad Why weather apps show absolute pressure?
  • pines-demon
  • · Replies 18 ·
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18
Undergrad 'Set of pearls' mathematics / physics help
  • lostsoul13
  • · Replies 8 ·
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8
Graduate Thought Experiment: "A Glimpse into Infinity"
  • Anti10188
  • · Replies 1 ·
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1
Drake Equation/Fermi Paradox vs. Hubble/JWST
  • Bystander
  • · Replies 4 ·
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4
High School Name or Label for the outermost point of a rotating object
  • Blizzardchris
  • · Replies 3 ·
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3
News Gerard't Hooft Interview
  • jedishrfu
  • · Replies 6 ·
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6
  • Poll Poll
Poll: For physics and math, Notebook vs Loose leaf papers
  • user079622
  • · Replies 52 ·
2
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Undergrad What can be used as a Frequency generator to make Chladni patterns?
  • gavinthoms
  • · Replies 3 ·
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3
Undergrad How Can I Build a DIY High Vacuum System Using Copper Instead of Glass?
  • Ludek
  • · Replies 5 ·
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5
High School Looking for info on old, unlabeled Geissler tubes
  • ADrake
  • · Replies 16 ·
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16
Undergrad Landau golden list
  • martinbn
  • · Replies 2 ·
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2
Graduate Veritasium Videos we all want (maybe)
  • TensorCalculus
  • · Replies 4 ·
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4
Graduate RIP Basil Hiley (1935–2025)
  • pines-demon
  • · Replies 3 ·
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3
High School The satellite and its work done
  • HLAung
  • · Replies 2 ·
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2
Undergrad The work done by an artificial satellite
  • HLAung
  • · Replies 4 ·
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4
Graduate Trying to understand the meaning of "Sum Rules"
  • qnach
  • · Replies 6 ·
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6
Rather interesting Physics Olympiad poster
  • greypilgrim
  • · Replies 5 ·
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5
Undergrad Are there reflections in the fourth dimension?
  • hydrostaticequil
  • · Replies 4 ·
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4
Flawed Artist's Renditions of Cosmological Events
  • ebos
  • · Replies 3 ·
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3
Graduate Can the radio noise of a civilization decrease over time?
  • Line_112
  • · Replies 6 ·
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6
Undergrad Cloud seeding and firefighting
  • hagopbul
  • · Replies 11 ·
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11
Graduate RIP Leon N Cooper (1930 - 2024) - Nobel 1972
  • robphy
  • · Replies 1 ·
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1
News Wasn't Parker Solar Probe about to resume communication with Earth?
  • mcastillo356
  • · Replies 5 ·
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5
  • Poll Poll
Graduate Theory Of Everything (ToE)
  • Agent Smith
  • · Replies 27 ·
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27
Why are the paths of our cosmic explorations pretty?
  • Trying2Learn
  • · Replies 16 ·
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16
High School Explanations about Kardashev type 1 civilizations
  • KingGambit
  • · Replies 7 ·
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7
Static electricity (like tree lightning) on my ceiling?
  • dbecker
  • · Replies 24 ·
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24
Undergrad AI Predicting Physics Research Results
  • ohwilleke
  • · Replies 1 ·
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1
Shout out to my HS Science teacher from 10 years ago
  • AlexB23
  • · Replies 2 ·
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2
Graduate Predictions for Physics Nobel Prize 2024 (and the results)
  • pines-demon
  • · Replies 37 ·
2
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Undergrad Airflow through an air extraction grill
  • Hedgehope
  • · Replies 3 ·
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3
Graduate What is a less painful way to study Lagrangian Mechanics?
  • lagrangian90
  • · Replies 4 ·
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4
High School How do I keep my room cool when my housemate wants the heating on?
  • zenpoopypants
  • · Replies 15 ·
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15