In physics, intensity is the power transferred per unit area, where the area is an imagined surface that is perpendicular to the direction of propagation of the energy. In the SI system, it has units watts per square metre (W/m 2).
The Ancient Greeks spoke Ancient Greek with three different major dialects: Aeolic, Doric and Ionic. They were the first Europeans to both read and write with an alphabet. This alphabet eventually led to the development of all modern European languages.
Greek is a language distinguished by an extensive vocabulary. The majority of the vocabulary of ancient Greek was inherited, but it does include a number of borrowings from the languages of the populations that inhabited Greece before the arrival of Proto-Greeks.