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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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14K
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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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7K
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Physics FAQs: All Your Questions Answered
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16K
A high school physics problem demonstrating relative motion
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143
High School Does acceleration affect impact energy vs constant velocity?
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High School Audio frequency of a humidifier
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12
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418
Variations on Sacharov's problem
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6
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501
New person here, where do I post my own personal hypothesis?
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15
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1K
RIP Chen Ning Yang (1922-2025)
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6
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1K
High School Is this a coincidence?... (distances between planets)
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7
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1K
Predictions for the Nobel Prize in Physics 2025 (results: John Clarke, Michel H. Devoret and John M. Martinis)
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37
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5K
RIP Daniel Kleppner (1932-2025)
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4
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749
Undergrad Mechanism of Energy Conservation in Zero-Amplitude Sum of EM Waveforms
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21
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2K
Undergrad An Imagined Diffraction Grating
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7
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669
Why Does Snow Pack Better Near the Melting Point?
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Insights Thinking Outside The Box Versus Knowing What’s In The Box
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26
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7K
Best physics magazines?
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1
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356
Graduate Monte Carlo simulation for the classical isotropic 3D Heisenberg model
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1
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4K
Einstein vs Newton - Who is your favorite and why?
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28
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Graduate Problem while simulating spin polarized interacting SSH model
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1
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1K
High School Mass & energy increments a la e = mc^2
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9
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609
High School Gravitational effects of a small black hole passing your body
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1
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579
High School Analog power supply output question
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2
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52
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3K
Graduate Screwy AAA Battery
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7
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512
To get rid of a singularity in the Lagrange equations
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11
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726
News RIP Kenneth Nordtvedt
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1
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459
Undergrad Question about the absorption of heat based on color
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4
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2K
APS's 2026 W.K.H. Panofsky Prize!
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1
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487
High School Opposite law propose
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2
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681
High School Why would an atmosphere without greenhouse gasses be colder than with them?
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2
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33
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Undergrad Why is the speed of light the same everywhere in the Universe?
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64
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11K
High School Is space stretching or is new space being created?
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High School How do walk-in freezers not give people hypothermia? [they do]
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13
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Undergrad Ramjet effect on drone
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15
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837
High School Generator shaft rotation through spring and magnet (Is this feasible in Physics?)
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13
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Undergrad Bilateral and unilateral constraints
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1
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413
High School Fusion breakthrough using 3-D magnetic coils
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1
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645
States of matter: "viscoelastic fluid", familiar term is "cream"
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5
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471
Undergrad Linear generator prototype
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22
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1K
RIP John Stachel (1928-2025)
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2
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893
High School Is Gravity an entropic property like Surface Tension
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2
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473
High School Is there a white hole inside every black hole?
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22
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741
Undergrad Are There Two Suns? Exploring the Phenomenon of Sun Dogs
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4
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598
Could the Laws of Physics Be Proportional to Entropy?
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5
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586
High School Need help understanding particle physics and quantum physics
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15
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925
Complexity Physics and Tipping Points in Chess
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22
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2K
RIP Mary Gaillard (1939-2025)
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3
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621
RIP George F. Smoot III (1945-2025)
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1
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604
Undergrad Raman Spectroscopy help
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1
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447
High School Does a Probabilistic Multiverse Invalidate the Value of Scientific Inquiry?
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2
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500
A Big Thank You to Physics Forums
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1
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476
High School Why Does Titan Have an Atmosphere While Other Large Moons Don't?
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16
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878
James Hartle RIP: Remembering a Beloved GR Teacher
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5
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Undergrad The Physics of unloading sand from a barge
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16
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849
High School Why can't Solar panels be hemispherical, or a curved strip type?
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2
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High School A Time Crystal Visible to the Human Eye
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5
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504
RIP Rainer Weiss (1932-2025)
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1
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540
How do people explore new ideas in physics?
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2
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52
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2K
Undergrad I need to simulate clothing meshes for hanging garments
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3
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566
Gravity in science fiction movies
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16
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775
RIP Jayant Narlikar (1938-2025)
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1
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563
AI vs. German Physics Olympiad
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5
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591
Undergrad How can quantum physics contribute to medical physics?
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1
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523
Physics inserted in society
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5
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633
High School Conservation of kinetic energy in expanding space
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25
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881
Seeking Interested Physicists
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2
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883
R.I.P. Sir Francis Graham-Smith 1923- 2025
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1
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626
Speculative theory
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2
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890
Dr. Eddie Boyes' Youtube videos on Quantum Entanglement
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3
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2K
High School Warp drive research of Prof David Pares
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3
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2K
High School Development of computer chips cooling
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4
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1K
High School Energy production that converts Hydrogen to Iron?
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4
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105
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10K
RIP Edwin F Taylor (1931-2025)
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3
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994
Using AI to evaluate white papers?
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2
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42
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Publishing Physics Without Institution: Any Tips?
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2
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40
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6K
Why weather apps show absolute pressure?
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18
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920
Undergrad "Best" software for emotor simulation?
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2
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1K
Graduate Bending Salt Crystals (xray monochromator)
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0
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1K
High School What Factors Influence the Survival and Growth of Accreting Bodies in Space?
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10
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Undergrad 'Set of pearls' mathematics / physics help
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8
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3K
Undergrad Why are we looking for a graviton?
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16
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High School Trying to understand orbiting objects in space
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8
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Thought Experiment: "A Glimpse into Infinity"
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863
Undergrad Why wouldn't two inductors provide a lag of 180 degrees?
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7
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Undergrad Meaning of average pressure in statistical mechanics
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1
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High School Why do objects break? (in the case of a body at rest on a surface)
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2K
Drake Equation/Fermi Paradox vs. Hubble/JWST
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4
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979
Undergrad Solving for Orbital Mechanics
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2
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1K
Undergrad Electric field in two dimensions in an electromagnetic wave
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2
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1K
Name or Label for the outermost point of a rotating object
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3
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High School Easier to pedal with physics
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18
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High School Help with refraction of light
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9
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1K
High School Can conservation laws take time to obey?
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1
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High School MIRV vs very high-yield bomb effectiveness
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12
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3K
Undergrad How can magnetic fields contain energy?
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17
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2K
News Gerard't Hooft Interview
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6
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Undergrad Units analysis for this phase shift problem using a differential equation
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3
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Undergrad Fresnel Zone Equation Problem
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8
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2K
  • Poll Poll
Poll: For physics and math, Notebook vs Loose leaf papers
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2
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52
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Undergrad Do curl/time dependent Maxwell's equations imply divergence equations?
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6
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2K
Undergrad What can be used as a Frequency generator to make Chladni patterns?
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3
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High School Rubber band force-extension graph
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6
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High School How much rubidium-88 is there in nature?
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2
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4K