<P> Localized wave packets , `` bursts '' of wave action where each wave packet travels as a unit , find application in many fields of physics . A wave packet has an envelope that describes the overall amplitude of the wave ; within the envelope , the distance between adjacent peaks or troughs is sometimes called a local wavelength . An example is shown in the figure . In general , the envelope of the wave packet moves at a different speed than the constituent waves . </P>
<P> Localized wave packets , `` bursts '' of wave action where each wave packet travels as a unit , find application in many fields of physics . A wave packet has an envelope that describes the overall amplitude of the wave ; within the envelope , the distance between adjacent peaks or troughs is sometimes called a local wavelength . An example is shown in the figure . In general , the envelope of the wave packet moves at a different speed than the constituent waves . </P>
what is the unit of wavelength of light
what is the unit of wavelength of light
wave packet
wave packet