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.
The earliest written evidence of the Greek language dates back to 1450 BC. Greek is mostly spoken in Greece, Albania, and Cyprus, by roughly 13 million people. The Greek language has a long and rich history which makes it among the oldest of European languages.