CHEM1105 Study Guide - Quiz Guide: Montreal Protocol, Ozone Depletion, Kyoto Protocol
Document Summary
Take-home test: the three ways in which electromagnetic radiation is involved in chemistry is with electric power, radio waves, and microwaves. Electric power covers the low frequency, long-wavelength end of the spectrum. The radiation is usually ducted along 2- wire and 3-wire transmission lines and sent to various devices besides antennas. At zero- frequency, batteries and dc power supplies emit the energy, while at 50 hz it is produced by rotary magnetic generators and ducted through the international power grids. Antennas of reasonable size generally utilize radio waves, so their wavelengths range from hundreds of meters to about one millimeter. Different parts of the radio spectrum are called bands. Common names for the different bands may refer to the wavelength, relative frequency or the type of transmission commonly used. They are used for transmission of data, via modulation. Examples of radio waves are through televisions, mobile phones, wireless networking, and amateur radios.
