Physics
Follow Physics in the Factlen app and get an alert when there is news. Get the app
- All Science
- Space
- Physics
- Biology & Life Sciences
- Chemistry
- Astronomy & Cosmology
- Psychology
- Neuroscience
- Engineering
- Mathematics
- Archaeology
- Scientific Discoveries
- Climate
- Climate Science
- Environment
- Research
- Academic Research
- Ecology & Environment
- Genetics & Genomics
- Public Health
- Discoveries
- Physics & Space
- Biology & Medicine
Explainer
The Non-Linear Shannon Limit: Why Increasing Power in a Fiber Optic Cable Eventually Decreases Its Data Capacity
8 sources · 34d ago
Explainer
The > 0.1 to < 0.7 Range: How the Eddy Dissipation Rate (EDR) Actually Quantifies the Severity of Flight Turbulence
5 sources · 34d ago
Explainer
The J2 Perturbation: How Earth's Oblateness Causes Orbital Precession
6 sources · 34d ago
More in Physics
ExplainerHardware Engineering
The Cavity Resonator and the Electron Trajectory: How a Magnetron Converts High-Voltage DC to 2.45 GHz Microwaves
RF Engineers 40%Appliance Technicians 35%Physicists 25%
ExplainerOrbital Reconnaissance
The GSD-Swath Trade-Off: How Ground Sample Distance and Coverage Area Dictate Satellite Reconnaissance Utility
Strategic Planners 35%Tactical Analysts 35%Systems Engineers 30%
ExplainerFundamental Constants
The 1/√(μ₀ε₀) Value: How the Permittivity and Permeability of Free Space Determine the Speed of Light
Relativists 40%Classical Physicists 30%Quantum Field Theorists 30%
Research BriefCosmic Microwave Background
The 2.725 Kelvin Blackbody Spectrum: How the Cosmic Microwave Background Provides a Snapshot of the Early Universe
Observational Cosmologists 40%Theoretical Physicists 35%Astrophysicists 25%
ExplainerReactor Physics
The Effective Multiplication Factor That Defines a Nuclear Reactor's Criticality
Reactor Operators 40%Criticality Safety Regulators 30%Nuclear Physicists 30%
ExplainerWater Infrastructure
The C × T Concept: How Contact Time and Concentration Dictate Water Disinfection Efficacy
Regulatory Agencies 40%Municipal Operators 35%Public Health Researchers 25%
ExplainerWater Electrolysis
The 1.23-Volt Thermodynamic Limit That Dictates the Efficiency of Water Electrolysis
Catalyst Engineering 40%Thermodynamic Baseline 35%System Scaling 25%
ExplainerInformation Theory
The H = -∑ p_i log_2 p_i Formula: How the Average Number of Bits Measures the Uncertainty of a Random Variable
Information Theorists 40%Machine Learning Engineers 40%Cognitive Scientists 20%
ExplainerThermodynamics
Why the F = C - P + 2 Formula Proves That Water Can Only Exist as a Solid, Liquid, and Gas at a Single Triple Point
Metrology & Standards 40%Theoretical Thermodynamics 30%Applied Materials Science 30%
ExplainerThermodynamics
The σT⁴ Law: Why a Small Temperature Rise Leads to a Massive, Non-Linear Increase in Radiative Heat Loss
Macroscopic Thermodynamics 45%Nanoscale Photonics 35%Theoretical Physics 20%
AnalysisFluid Dynamics
The Re ≈ 2300 Threshold: Why a Single Dimensionless Number Quadruples the Energy Loss in a Pipe
Industrial Engineers 40%Theoretical Physicists 30%Fluid Dynamicists 30%
Black Hole PhysicsScientific Breakthrough
Black Holes of All Sizes Launch Jets at the Same Critical Feeding Rate
Theoretical Astrophysicists 40%Observational Astronomers 40%Galactic Evolution Researchers 20%
Deep DiveBattery Physics
The C-Rate, Temperature, and State of Charge Limits That Define an EV's DC Fast Charging Curve
Speed-Optimized Manufacturers 45%Battery Longevity Advocates 35%Thermal Management Engineers 20%
ExplainerDirected Energy
The Power-Aperture Trade-Off: How Beam Quality and Power Dictate Directed Energy Weapon Range
Optical Physics Realists 40%Directed Energy Proponents 35%Kinetic Weapon Advocates 25%
ExplainerFundamental Constants
The 1/137.036 Value: How the Fine-Structure Constant Quantifies the Strength of the Electromagnetic Interaction
Standard Model Theorists 70%Cosmological Variation Proponents 30%
ExplainerKinetic Energy
The Inverse Square Law: How a Vehicle's Speed Quadruples the Energy Dissipated in a Crash
Traffic Engineers 40%Public Health Researchers 35%Physics Educators 25%
ExplainerThermal Physics
The e^(-E_a/RT) Term: Why the Arrhenius Equation Proves That a 10°C Temperature Rise Can Halve the Lifespan of Electronics
Thermal Engineers 40%System Integrators 40%Reliability Skeptics 20%
ExplainerAppliance Science
The Air Watt Measurement: How the Combination of Airflow and Suction Actually Dictates a Vacuum Cleaner's Deep-Cleaning Power
Aerospace & Testing Engineers 40%Consumer Marketing Departments 30%Commercial Janitorial Standards 30%
ExplainerOrbital Mechanics
The Delta-V Savings and Time Penalty of Bi-Elliptic Transfers Over Hohmann Transfers
Orbital Dynamicists 40%Mission Planners 35%Spacecraft Engineers 25%
ExplainerSteering Geometry
The Ackermann Angle: How the Steering Trapezoid Ensures All Four Wheels Roll Without Scrubbing
Passenger Vehicle Engineers 45%Motorsport Aerodynamicists 40%Vehicle Dynamics Analysts 15%
ExplainerBiophysics
The 3/4 Exponent: Why an Animal's Metabolic Rate Scales to the Power of Mass, Not Volume
Universal Fractal Theorists 40%Empirical Biologists 35%Ecological Contextualists 25%
ExplainerGrid Infrastructure
The 300-Year Half-Life: How the Radiative Forcing of Sulfur Hexafluoride Makes It the Most Potent Greenhouse Gas
Atmospheric Monitoring 40%Regulatory and Inventory 35%Infrastructure and Policy 25%
ExplainerPropellant Chemistry
The Physics of Liquid Rocket Propellants: Cryogenic, Hypergolic, and Storable Architectures
Deep Space Architects 40%Orbital Maneuvering Specialists 35%Green Propulsion Advocates 25%
ExplainerMaterials Science
The Wetting Condition: Why a Material's Surface Energy Must Exceed the Adhesive's Surface Tension for a Strong Bond
Materials Scientists 45%Manufacturing Engineers 35%Adhesive Formulators 20%
ExplainerThermostat Strategies
The 1% Per Degree Rule: How Thermostat Setbacks Translate to Actual Heating Energy Savings
Building Scientists 40%HVAC Technicians 35%Energy Regulators 25%
ExplainerFire Safety Tech
Particle Size vs. Sensor Type: Why Your Smoke Detector Might Ignore a Smoldering Couch Fire
Fire Safety Researchers 40%Regulatory Bodies 35%Municipal Fire Departments 25%
ExplainerStorage Physics
The Superparamagnetic Limit: Why Thermal Stability, Not Manufacturing, Sets the Ultimate Boundary on Hard Drive Storage Density
Solid-State Physicists 40%Manufacturing Engineers 30%Hyperscale Cloud Providers 30%
ExplainerMaterials Science
The σ ∝ 1/√c Relationship: Why the Strength of Brittle Materials Is a Function of Flaw Size, Not Atomic Bonds
Structural Engineers 40%Theoretical Physicists 30%Nanomaterial Researchers 30%
ExplainerFluid Dynamics
The Von Kármán Vortex Street: Why Aerodynamic Stability Demands Open-Truss Suspension Bridges
Aerodynamic Engineers 45%Fluid Dynamicists 30%Structural Economists 25%
ExplainerElectric Propulsion
The Mechanism of the Hall-Effect Thruster: How an Electric Field and a Magnetic Field Accelerate Xenon Ions to 40,000 m/s
Commercial Satellite Operators 40%Deep Space Exploration Planners 30%Plasma Physicists 30%
ExplainerPropulsion Physics
The Specific Impulse Metric: How Exhaust Velocity Dictates the Trade-off Between Rocket Thrust and Fuel Efficiency
Chemical Propulsion Engineers 35%Electric Propulsion Specialists 35%Nuclear Thermal Advocates 30%
ExplainerAcoustic Physics
The 3:2, 4:3, and 2:1 Ratios: How Simple String Length Divisions Define the Perfect Fifth, Fourth, and Octave
Acoustic Physicists 40%Historical Musicologists 30%Modern Performers 30%
ExplainerBattery Management
The State of Charge and Temperature Limits: How EV Battery Management Systems Cap Regenerative Braking Power
One-Pedal Driving Advocates 40%Blended Braking Engineers 40%Battery Chemists 20%
ExplainerCocktail Science
The 10% to 20% Air Incorporation: How Shaking Creates Opacity and Texture in Cocktails
Traditional Mixologists 40%Culinary Scientists 40%Home Bartenders 20%
ExplainerWearable Audio
The Mechanism of Bone Conduction: Why Wearable Transducers Bypass the Eardrum but Struggle with Bass
Acoustic Physicists 40%Wearable Device Engineers 35%Clinical Audiologists 25%
ExplainerSpace Law
The 15-Minute Threshold: How the Karman Line Defines the Boundary Between Airspace and Outer Space
International Sporting Consensus 35%Astrodynamic & Military Standard 35%Legal & Policy Analysts 30%
ExplainerInformation Theory
Why the Bekenstein Bound Proves That Exceeding a Physical Information Density Threshold Creates a Black Hole
Holographic Principle Theorists 40%Quantum Information Theorists 35%Covariant Entropy Proponents 25%
Deep DiveMotor Architecture
Axial Flux vs. Radial Flux Motors: The Trade-Offs Defining Next-Generation EV Performance
Mass-Market Automotive OEMs 45%Performance & Aerospace Engineers 35%Manufacturing & Tooling Suppliers 20%
ExplainerSatellite Navigation
The Four-Satellite Trilateration Principle: How GPS Receivers Calculate Position by Correcting for Clock Drift
Consumer Navigation 40%Precision Surveying 35%System Operations 25%
ExplainerArchitectural Layouts
Why the 'Broken Plan' is Replacing the Open Concept Home
Broken Plan Advocates 45%Open Plan Advocates 30%Acoustic Designers 25%
Research BriefOrganic Catalysts
New Coumarin-Linked Organic Catalyst Extends Solar Charge Lifetime by 1,000 Times for Hydrogen Production
Materials Scientists 45%Renewable Energy Advocates 35%Scale-Up Skeptics 20%
ExplainerThermodynamics
The Coefficient of Performance: Why Heat Pumps Are Thermodynamically Mandated to Be More Efficient Than Furnaces
Thermodynamic Purists 40%Energy Economists 40%Field Researchers 20%
ExplainerFatigue Limits
The 10^7 Cycle Threshold: Why Steel Can Be Designed for 'Infinite Life,' But Aluminum Cannot
Aerospace Engineers 40%Civil and Structural Engineers 40%Materials Scientists 20%
ExplainerRadiation Physics
The Physics of How Concrete, Water, and Lead Shield Alpha, Beta, Gamma, and Neutron Radiation
Health Physicists 40%Nuclear Structural Engineers 35%Materials Scientists 25%
Deep DiveFuel Cell Physics
The Nernst Equation and the Proton Exchange Membrane That Dictate Fuel Cell Voltage and Efficiency
Commercial Integrators 40%Thermodynamic Purists 30%Materials Scientists 30%
ExplainerDark Matter
The Flat Galactic Rotation Curve: How Missing Mass Explains the Speed of Stars Far From the Galactic Center
Standard Cosmological Model 75%Modified Gravity Theorists 15%Observational Astrometrists 10%
Per page

















































