Golden ratio, divine proportion, Fi number (Φ)
The parts of a segment divided in golden proportion are to each other, as is the longer part to the entire length.
a / b = (a + b) / a = Φ = 1.6180339887498948482045868343656 …
It often occurs in nature and is associated, for example, in physics with the lowest energy.
See the Fibonacci Sequence
Do you know that … ?
The golden ratio appears very often on this website …