(The Ten equations that changed the world)
The brightest minds in history have used mathematics to
lay the foundation for how we measure and understand our universe. Time and time again,
we have proved that it only takes one simple formula to alter the course of
humanity. Here are ten equations that did just that.
1. ISAAC NEWTON’S LAW OF UNIVERSAL GRAVITATION:
Newton’s law explains why the planets move the way they
do, and how gravity works, both on earth and throughout the universe. First published
in The Principia in July 1687, the Law
of Universal Gravitation was the defacto reference equation for nearly 200
years until Einstein’s Theory of General Relativity replaced it.
Einstein’s most famous undertaking is the generally
accepted theory on the relationship between space and time. First proposed in
1905, the Theory of Relativity has both radically altered the course of
physics and deepened our knowledge of the universe’s past, present, and
future.
This ancient theorem – first recorded circa 570 – 495 BC –
is a fundamental principle in Euclidean Geometry and the basis for the
definition of distance between two points. Pythagoras theorem also describes
the relationship between the sides of a right triangle on a flat plane.
James Clerk Maxwell’s set of equations describes how
electric and magnetic fields are generated and altered, both by each other and
by charges and currents. First published between 1861 and 1862, they are to
classical electromagnetism what Newton’s laws of motion and universal
gravitation are to classical mechanics.
Rudolf Clausius’ law states that energy always flows from
higher concentration to lower concentrations. It also states that whenever
energy changes or moves, it becomes less useful. Formulated in 1865, it has led
to the development of technologies like internal combustion engines,
cryogenics, and electricity generation.
Logarithms were introduced by John Napier in the 17th
century as a way to simplify calculations. They answer the question, “How many
x number do we multiply to get y number?” Logarithms were adopted by early
navigators, scientists and engineers. Today, scientific calculators and digital
computers do the work for us.
The calculation shown is the definition of the derivative
in differential calculus, one of calculus’ two major branches. The derivative
measures the rate at which a quantity is changing – if you are walking 2 km an
hour, then you will change your position by 2 km every hour. In the 1600s, Newton
used calculus to develop his laws of motion and gravitation.
This equation describes how the quantum state of a quantum
system changes with time. Developed by Austrian Physicist Erwin Schrödinger in
1929, it governs the behaviour of atoms and subatomic particles in quantum
mechanics. Schrödinger’s Equation paved the way for nuclear power, microchips,
electron microscopes, and quantum computing.
Information theory is a branch of mathematics that
studies the coding of information in the form of sequences of symbols, and
speed at which that information can be transmitted.
Applications of topics within information theory include
data compression and channel coding. Research in the development of the internet
and mobile phones.
Chaos Theory is a branch of mathematics that studies
complex systems whose behaviour is extremely sensitive to slight changes in
conditions. In essence, it shows how small alterations just about everywhere –
meteorology, sociology, physics, computer science, engineering, economics,
biology, and philosophy.
References:
1. Five Equations that changed the World. Retrieved from Wikipedia
http://en.wikipedia.org/wiki/Five_Equations_That_Changed_the_World
2. 17 Equations that Changed the Course of History.
Retrieved from Science alert http://www.sciencealert.com/the-17-equations-that-changed-the-course-of-history?perpetual=yes&limitstart=1
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