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Physics Facts

The Doppler Effect

As any object moves through the air, the air near the object is disturbed. The disturbances are transmitted through the air at a distinct speed called the speed of sound, because sound itself is just ... Continue reading

Sound is just a sensation created in the human brain in response to small pressure fluctuations in the air.

Delivered by TIR

The content of this article has been delivered to you via internet fiber-optic links. Today most phone conversations, fax transmissions and almost all internet and email traffic travel at the speed of ... Continue reading

Fiberoptic cable

Newton's First Law of Motion

Sir Isaac Newton first presented his three laws of motion in the 'Principia Mathematica Philosophiae Naturalis' in 1686. His first law states that every object will remain at rest or in uniform motion ... Continue reading

The story of Isaac Newton discovering the laws of gravity by watching apples falling from a tree is probably just a myth. He did do his work on gravity while at a farm, but that is about as much as can be proven.

The World's Largest Laser

In a rural community in Northern California, in a building spanning the length of two football fields scientists are creating the world's largest laser. The National Ignition Facility project, know as ... Continue reading

The target chamber inside which NIF's 192 laser beams will converge upon a fusion-fuel-filled target.