This release covers a progress payment for the work, materials or equipment furnished by the. undersigned to the Property or to the Undersignedâs Customer which are the subject of the Invoice or. Payment Application, but only to the extent of the Payment Amount or such portion of the Payment.
In contrast, visible light and longer-wavelength electromagnetic radiation, such as infrared, microwaves, and radio waves, consists of photons with too little energy to cause damaging molecular excitation, and thus this radiation is far less hazardous per unit of energy.
Although turning on a radio produces sound, radio waves themselves cannot be heard and have nothing to do with sound waves. While sound waves are a vibration of the air, radio waves are electromagnetic and a part of the light spectrum. Radio waves travel at a speed of 186,282 miles (299,727 kilometers) per secondâthe speed of light.