The letter 'h' is the eighth letter of the English alphabet and is often used to represent a variety of concepts. In the context of the English language, 'h' can also refer to the sound it represents, which is a voiceless glottal fricative. Additionally, it is frequently used in mathematics, physics, and other scientific fields to denote particular constants or variables, such as Planck's constant or height.
The letter ‘h’ originates from the ancient Latin alphabet borrowed from the Greek letter 'Eta' (Η, η). The Greek letter is derived from the Phoenician letter 'Chet,' which represented a sound similar to what we denote with 'h' in modern English.