CHEM103 Chapter 8: Ch.8 Electrons in Atom

• School: University of Alberta
• Department: Chemistry
• Course: CHEM103
• Professor: Veinot( G)

Document Summary

Electromagnetic radiation is a form of energy transmission in which electric and magnetic fields are propagated as waves through empty space (a vacuum) or through a medium, such as glass. A wave is a disturbance that transmits energy through space or a material medium. The maximum height of the wave above the center line or the maximum depth below is called the amplitude. The distance between the tops of two successive crests (or the bottoms of two troughs) is called the wavelength, designated by the greek letter lambda, . Wavelength is one important characteristic of a wave. Another feature, frequency, is the number of crests or troughs that pass through a given point per unit of time. Frequency has the unit, usually (per second), meaning the number of events or cycles per second. The si unit for frequency, s-1 is the hertz (hz), and the basic si wavelength unit is the meter (m).