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Physics Facts

How Fast is Mach 1?

A Mach number is a common ratio unit of speed when one is talking about aircrafts. By definition, the Mach number is a ratio of the speed of a body (aircraft) to the speed of sound in the undisturbed ... Continue reading

Mach 1: Fast planes and Ernst Mach

Somewhere Over Which Rainbow?

How many rainbows are there really when we only see one during a rainstorm? The answer isn't as simple as you might think! Rainbows are formed when light enters a water droplet, reflects once inside ... Continue reading

Double rainbow, note the color reversal in the faint, secondary rainbow.

Poincare's Chaos

Over two hundred years after Newton published his laws of planetary motion the King Oscar II of Sweden and Norway sponsored a most unusual competition that would discover a whole new science. ... Continue reading

Jules Henri Poincare (1854-1912)

The Weakest Force

Did you know that gravity is the weakest force in the universe? Well, it's true! There are four fundamental forces (that we know of) in our universe: Strong Nuclear, Electromagnetic, Weak Nuclear ... Continue reading

Gravity Is the Weakest!