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Physics Facts

Tick-Tock Atomic Clock

Modern navigators rely on atomic clocks. Instead of old-style springs or pendulums, the natural resonances of atoms -- usually cesium or rubidium -- provide the steady 'tick' of an atomic clock. The ... Continue reading

24 GPS satellites orbit Earth.

The Equivalence Principle

Four hundred years ago--or so the story goes--Galileo Galilei started dropping things off the Leaning Tower of Pisa: Cannon balls, musket balls, gold, silver and wood. He might have expected the ... Continue reading

Ultraviolet Light

Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the 'electromagnetic spectrum'. Radiated energy, or radiation, is given off by many ... Continue reading

Images from the EIT (Extreme-ultraviolet Imaging Telescope) instrument on the SOHO spacecraft.

Single Molecule Electroluminescence

Incandescence and luminescence are two main ways of producing light. In incandescence, electric current is passed through a conductor (filament of a light bulb for example). The resistance to the ... Continue reading

(A) Silver oxide film exposed to DC current; (B) activated regions emitting light when conected to AC current; (C) zoom shows single molecule electroluminescence

More Physics Facts

Atmospheric :

  1. Coming In Strong On Your AM Dial
  2. Does Earth Have Its Own Neon Sign?
  3. Somewhere Over Which Rainbow?
  4. Sonic Boom
  5. The Coriolis Effect
  6. The Doppler Effect
  7. The Sound of Turbulence
  8. Your Own Personal Rainbow?

Classical Mechanics:

  1. Can You Miss the Earth?
  2. Don't Make Waves
  3. What Makes a Frisbee Fly?
  4. Why Does A Golf Ball Have Dimples?
  5. Your Serve

Electricity:

Fundamentals:

  1. Bizarre Boiling
  2. Galileo Thermometers
  3. Get the Point?
  4. How Fast is Mach 1?
  5. How Lasers Work
  6. Kinetic Theory of Gases
  7. Many Happy Returns!
  8. Newton's First Law of Motion
  9. Newton's Three Laws of Motion
  10. The Fourth State of Matter
  11. The Physics of Sandcastles
  12. The Weakest Force
  13. Tick-Tock Atomic Clock
  14. Torque
  15. What Is An Atom?
  16. What Is Radiofrequency Energy (Rf)?
  17. X-Rays - Another Form of Light

Magnetism:

  1. Earth's Magnetism

Nonlinear Dynamics & Chaos:

  1. Poincare's Chaos

Optics:

  1. Delivered by TIR
  2. Does Your Brain Do Flips?
  3. Quick Change Artist
  4. Single Molecule Electroluminescence
  5. Ultraviolet Light

Quantum Mechanics:

  1. Antimatter Discovery
  2. Neutrinos to the Rescue
  3. Quarks
  4. The Early Universe Soup
  5. The Equivalence Principle
  6. The World's Largest Laser

Radioactivity:

  1. Carbon Dating From The Skies
  2. Fission and Fusion
  3. Nuclides & Isotopes
  4. When Do We Encounter Ionizing Radiation In Our Daily Lives?

Solid State:

  1. Can Wint-O-Green Lifesavers® Light up Your Life?

Thermodynamics:

  1. Ultraviolet Light

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