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.
Medium wavelength radio waves are reflected from the ionosphere, a layer of charged particles in the upper atmosphere, so they can be used for long distance communication. Digital radio has better-quality reception as it uses digital signals and so does not have problems of noise and interference.