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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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Recent Noteworthy Physics Papers
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List of credible physics journals
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B What is the Conversion Factor for Hectacomb Sacrifices?
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Insights How to Better Define Information in Physics - Comments
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Physics FAQs: All Your Questions Answered
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A Relation between Rosenbluth Potentials and Spitzer Resistivity
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A How does phase of merging sines affect overall periodic tones?
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B Interactive visualization of the Hopf fibration
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B Too much energy -- thought experiment
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B Calculating vacuum -- These numbers do not make sense
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23
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I Density fluctuations and the color of the sky
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164
B Circular motion as a result of the Lorentz force
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11
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210
I Any alternatives to Tracker from physlets?
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3
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126
B Question about the nature of an implosion of a vacuum chamber
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2
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179
I Increasing tone while mixing sugar in water
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4
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154
I Why was a HAM radio license required to operate early lasers?
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8
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197
I NASA is seeking a faster, cheaper way to bring Mars samples to Earth
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6
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321
B Could you use the moon to reflect sunlight onto a solar sail?
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20
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702
I Biot Savart law gives us magnetic field strength or magnetic flux density?
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328
I Why charge density of moving dipole is dependent on time?
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3
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B I have a question about energy & ignoring friction losses
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5
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496
I What Causes the Einstein - de Haas Effect in Iron Rods?
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I Effects of the centre of gravity on aircraft's stability
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338
B Mean Free Path And Ball Bearings In A Box
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3
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B Why is My Homemade Cloud Chamber Not Working?
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3
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406
B I have a question regarding temperature and the kinetic energy of molecules
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3
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411
B What ever happened to Classical Unified Field Theory?
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356
B Can Earth or any spherical object in space act as a particle collider?
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428
I Why does my ceiling glow in the dark?
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520
Physics equations with the mathematical constant Phi?
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I Understanding Ewald's sphere in the context of X-Ray diffraction
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B Exploring the equivalences between mass, time and length
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I How long would a tuning fork vibrate in vacuum?
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A From Nyquist plot to real conductivity spectra (sigma)
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I Can the 3D Ising model be considered solved?
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B What is currently known about fields other than gravitation?
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I Gravitation In Higher Dimensions
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I Single-Slit Diffraction -- Deriving the relation for the minima
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I Is "scalar wave" a legitimate term?
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B Speed of light and Euler's constant
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A Can someone explain this statement on luminous transmittance?
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I What happens when an explosion occurs on the surface of the moon?
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486
I How can concentration gradient field come into existence immediately?
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B Are there any unsolved physics problems?
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I Why is not possible to store electric energy from a Lightning?
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B How would physics change if Planet 9 were a primordial black hole?
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I Superconductivity energy saved v Cooling/Heating energy loss
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B Information sources and physics teaching
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B Quanta Magazine Video on Biggest Breakthroughs in Physics in 2023
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I Maxwell's equations and the momentum of charge
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I Would aluminium foil increase copper tubing insulation?
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625
Does the Universe have a finite number of fundamentals to uncover?
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A Effects of magnetic fields on material (Magnetic resonance)
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I Lost Energy from a Reciprocating Piston
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B How does mechanical motion start at the deepest, smallest level?
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I What is the Uncertainty in the Total Weight of a Collection of Similar Items?
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12
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A Correcting units from this physics paper?
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681
I Confused about unit conversion involving natural units
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2
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744
I How to calculate incident light on surface with multiple orientations?
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1
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683
A Photon Bouncing during APD Dead Time in Autocorrelation Measurement
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679
A Unsolved Problems in Near Surface Geophysics
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638
I A question with regard to Hooke's and Kepler's laws
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24
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806
Time crystals: They require energy added back into them?
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10
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I Coherent two-photon lidar...does this mean lidar range is greater?
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1
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632
B Help with personal thoughts and observations in attempt to understand the fourth dimension better
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3
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B Where the extra energy comes from?
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9
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I Integrity of matter / space and time
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13
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I Data collected from different devices: how to combine for analysis?
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8
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I How ICBMs get to their targets
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13
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B Why is my small Bi-2223 superconductor not levitating or locking above magnets?
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8
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B Wi-Fi Interference: How Microwaves Can Affect Your Wireless Connection
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24
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B Are toxins (poisons, forever chemicals, etc) eventually deactivated or neutralized by their own reactions?
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6
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I Making LED bulbs safer: Health and LEDs
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I Trying to understand the inner workings of a solar cell
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B Temperature of container, temperature of contents
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I Radiant Intensity from Radiant Power and Intensity Distribution
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B Is it possible to boil water by stirring it?
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I What can we scientifically measure directly?
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B Can we use a permanent magnet and a copper rod to create an electret?
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B Why is the test charge always positive?
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I Exploring Link Movement in X-Y-Z Axis: How Does This Linkage Rotate and Yaw?
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3
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I Restoring S.I. units to a Lagrangian in natural units
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B Which science communicator do you find to maintain the most accuracy?
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30
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I De Broglie Wavelength at rest: λ = h/p = h/0 when v=0?
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I Question about electromagnetics (waves and particles)
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28
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I Questions about deriving generic equations/laws from specific equations/laws
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I Existential problem on Electromagnetism and the combination of Relativity and Quantum Mechanics
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8
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B My strain gauge on a cantiliver beam is reading 0.040V before force is applied...
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3
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995
I Looking for a unified expression for energy in rotating systems
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I How was electronics propagation delay measured historically?
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I Applications for negative radiation pressure?
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I Flow rate calculation for laser cutting nozzles
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B Everyday microwave oven physics: Does the energy transferred depend on what is inside?
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33
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I How can tomographic image resolution be obtained using wifi sensing and imaging?
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3
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996
I The best way to keep an office cool in the hot summer
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B Need help with understanding time travel
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B Why is the electron the only particle dominating technology?
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6
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B Where Do Electrons Go When a Battery Loses Charge?
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B The Mystery of Blackbird: Exploring Wind Power Leverage
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The effects of absolute zero temperature
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14
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B Neutrino physics -- What are the project goals for the Jiangman underground observatory (JUNO)?
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B Moist air - does it rise or drop?
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B Is Time a Fundamental Force in Physics?
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B Is a 'Brain Wave' a Real Wave?
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I Where can I find explanations about physics applications in real life?
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Physics is the scientific study of the fundamental principles governing the behavior of matter and energy in the universe. It explores the nature of space, time, motion, forces, and the interactions between particles and fields.

Physicists seek to formulate laws and theories that describe the fundamental forces shaping the cosmos, from the microscopic world of subatomic particles to the vastness of galaxies. Divided into classical and modern physics, the discipline encompasses mechanics, electromagnetism, thermodynamics, quantum mechanics, and relativity.

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