10 Interesting Mathematical Constants That Changed the World

The fundamental constant of physics, the Boltzmann constant, is one of the seven “defining constants” that have been given exact definitions.

The gravitational constant, G, is utterly important for any engineer. It helps determine the force between two masses.

The speed of light is a universal physical constant. It is equal to 299792458 meters per second (approximately 300000 km/s).

The Avogadro constant is a number used to explain atoms, molecules, ions, and electrons. It is named after the scientist Amedeo Avogadro.

Planck’s constant is a fundamental physical constant that is utterly important in quantum mechanics. It is named after Max Planck.

In math, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.

Euler’s number, the number e, is a mathematical constant approximately equal to 2.71828. You see the number e in mathematics almost every day.

The number π is a mathematical constant, approximately equal to 3.14159. It is the ratio of a circle’s circumference to its diameter.

Euler’s identity is a mathematical beauty that ties five fundamental mathematical constants in mathematics together.

The imaginary unit, i, is a solution to the quadratic equation x^2 + 1 = 0. It is called imaginary because there are not real numbers.