Light slideshare grade 7. Light is just one form of electromagnetic radiation, or electromagnetic...

Light slideshare grade 7. Light is just one form of electromagnetic radiation, or electromagnetic waves. The study of light and its interaction with matter is termed optics. 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. The main source of natural light on Earth is the Sun. The observation and study of optical phenomena such as rainbows and the aurora borealis offer many clues about the nature of light as well as much enjoyment. The largest electromagnetic waves, with wavelengths from a few centimeters to over 100 meters are called radio waves. Light shines on an object, then bounces off, or reflects, back to our eyes. . With the development of electric lights and power systems, electric lighting has effectively replaced firelight. Visible light is all the colors (red, yellow, blue, etc. knxgb arcu jpwx rjya hnqemp abxsa tlsk vxkd sjvzsuqq zntciu