Phi (/ faɪ / ⓘ; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî [pʰéî̯]; Modern Greek: φι fi [fi]) is the twenty-first letter of the Greek alphabet. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ph .

Phi (uppercase/lowercase Φ φ), is the 21st letter of the Greek alphabet, used to represent the "ph" sound in Ancient Greek. This sound changed to "f" some time in the 1st century AD, and in Modern Greek the letter denotes the "f" sound.

Phi is the 21st letter of the Greek alphabet. It is used in various contexts, including mathematics, science, and engineering, where it often represents the golden ratio (φ). Uppercase Phi - Φ; Lowercase Phi - φ

The Greek letter φ (phi) is used in geometry as a constant to represent the golden ratio.

Phi (Φ, φ) is the 21st letter of the Greek alphabet. In the system of traditional Greek numerals, phi has a value of 500 (φʹ) or 500,000 (͵φ).

Phi (uppercase Φ, lowercase φ) is the 21st letter of the Modern Greek alphabet. In the Greek number system, it was taken as the symbol of 500. In math, the lowercase letter phi (φ) is used to indicate the golden ratio.

Greek alphabet letters and symbols. Greek letters pronunciation.

Phi ( Φ = 1.618033988749895… ), most often pronounced fi like “fly,” is simply an irrational number like pi ( p = 3.14159265358979… ), but one with many unusual mathematical properties. Unlike pi, which is a transcendental number, phi is the solution to a quadratic equation.

The Phi symbol is represented as φ (standard lowercase), Φ (standard uppercase), and ϕ (variant). It originates from the Greek alphabet and has found diverse applications in various scientific, academic, and engineering fields.

Dec 26, 2024 · ϕ, often used as a symbol for various things; or ɸ, the form properly used if denoting a voiceless bilabial fricative (these two forms are, in many fonts, indistinguishable or nearly so; Times New Roman is one font in which they are clearly distinct). 𝜙, sometimes used as a symbol. Φ on Wikipedia.