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.
Visitors who speak English should not experience a language barrier, but learning the letters of the Greek alphabet is useful. In addition, a Greek Sign Language also exists and is the official language in Greece of the deaf community. Some minority languages are also spoken in Greece, such as Albanian, Armenian and Turkish to name a few.