The Roundest Object Ever Created Is Made Of?
Starting in the 1990s, metrology institutes—organizations devoted to the scientific study of measurement—began collaborating on the Avogadro Project. This was an ambitious project intended to redefine the kilogram in the framework of a universal physical constant rather than the current method, which is to use the international prototype kilogram, a cylinder manufactured from a platinum–iridium alloy.
To that end, the Avogadro Project has created a perfect sphere of silicon with a mass of exactly 1 kilogram. This sphere, roughly the size of a softball, is so perfectly spherical that if you enlarged it to the size of the Earth, the variation in topography from the highest to lowest points on the silicon planet would be no more than 2.4 meters—as it stands, the sphere in its present size has a topographic variation of about 0.3 nanometers.
So why silicon? Thanks to the semiconductor industry, there was both ample existing research and actual industrial processes in place to allow for the creation of incredibly pure and imperfection-free silicon, leaving the scientists to the task of carefully cutting and polishing their silicon sample down to a perfect kilogram sphere.
The THX Theater Sound Standard Got Its Start With The Film?
The Largest Man-Made Explosion, Prior To The Invention Of The Atomic Bomb, Was A Result Of A?
The First CPU Widely Used In Hobbyist Computers Was The?
The Longest Running Movie Franchise In The World Is?
The First Feature Film To Employ Stereo Sound Was?
If You’re Eating Potato Chips There’s A Good Chance The Potato Was Grown In?
Which Country Is The Largest Exporter Of Cigars In The World?
The Rotating Displays Used On Dozens Of Game Shows Throughout The 20th Century Are Called?
Which Creature Uses The Poisonous Tentacles Of The Portuguese Man O’ War Jellyfish As Weapons?