Light travels thru space and is a form of radiant E. 2. Light was originally believed to be a beam of E moving through space in the form of waves. Later, light was found to behave like a stream of extremely small, fast-moving particles. Today, light is recognized as having prop of both waves and particles. Emr is a form of energy that exhibits wavelike behavior as it travels thru space.
All waves have properties of amplitude, wavelength, frequency, and speed.
Wavelength is the distance between successive crests of the wave. The shorter the wavelength, the greater the frequency. Sunlight thru a prism produces a rainbow of colors called a visible spectrum. It is a continuous spectrum because one color fades into the next color. Violet has the shortest l and red has the longest l. Visible light is only a small portion of the EMR spectrum.