9781422282946

11

Science and Information Technology

The Italian inventor Guglielmo Marconi created radio, a key forerunner to communication advances that have led to today’s wireless world.

the past, proving that truly revolutionary scientific work has the capacity to transcend eras and international boundaries.

Radio and Global Positioning Technology What is a radio wave, and why is it so important to modern tech- nology?A radiowave is a formof electromagnetic radiation that conveys information in the form of sounds or pictures.An input device, such as a microphone, converts sounds into electrical signals that are carried in wave form. When these radio waves