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 the national language of Greece, where it is spoken by about 10.7 million people, and the co-official language, along with Turkish of Cyprus, where it is spoken by 1.1 million people (Ethnologue). It is a de facto provincial language in some provinces of Albania, where it is spoken by some 15,000 people. In addition, it is spoken in many other countries where there are Greek immigrants. Greek is one of the 23 official languages of the European Union.