Wind speed is measured using an anemometer. It is typically made up of cups attached to spindle. The stronger the wind the faster the cups rotate and the higher the reading. Several readings should be taken over a couple of minutes and an average taken. The measurement is sometimes made in knots but any speed unit is possible. Cumulus supports: If you have a Davis weather station see #What_do_the_various_wind_speeds_in_Cumulus_correspond_to.2C_with_Davis_stations.3F.
a wave propagated at the speed of light by the periodic variations of electric and magnetic fields. electromagnetic wave. A wave of energy consisting of oscillating electric and magnetic fields. Radio waves, light waves, and x-rays are electromagnetic waves.
The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes  the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.adio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each traveling in a wave-like pattern at the speed of light.