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Light Also Keeps The Earth Warm Light Exists In Tiny Energy Packets Called Photons Each Wave Has A Wavelength Or Frequency The Human Eye Sees Each Wavelength As A Different Color.
Other Colors Can Be Seen Only With Special Cameras Or Instruments: Wavelengths Up The Frequency Of Red Are Called Infrared And Higher Than Of Violet Are Called Ultraviolet.
Light Moves In A Straight Line The Straight Line Path Is Often Drawn As A Ray That Moves In One Direction Ray Diagrams Are Used To Illustrate Light Traveling From One Place.
Light Is A Form Of Electromagnetic Radiation It Is The Natural Agent That Stimulates Sight And Makes Things Easy To See Light Is The Opposite Of Darkness.
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