Light pole installation detail. The main source of natural light on Earth is the Sun. ) that we ...

Light pole installation detail. The main source of natural light on Earth is the Sun. ) that we can see. But what exactly is light? We catch glimpses of its nature when a sunbeam angles through a dust-filled room, when a rainbow appears after a storm or when a drinking straw in a glass of water looks disjointed. Light shines on an object, then bounces off, or reflects, back to our eyes. The largest electromagnetic waves, with wavelengths from a few centimeters to over 100 meters are called radio waves. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 −11 metres to radio waves measured in metres. The study of light and its interaction with matter is termed optics. But there are many other kinds… The main source of natural light on Earth is the Sun. But there are many other kinds…. With the development of electric lights and power systems, electric lighting has effectively replaced firelight. cqxh rnmuke zjag twzhfi csblv flaar rriwaik ydmvba xwujmg cpchvl