These small cumulus clouds may grow larger and denser indicating strong rising air currents carrying moist air rapidly to higher levels. Eventually another cumuliform cloud called a cumulonimbus cloud or thunderhead may develop bring violent rain, hail, wind gusts, thunder and lightening. The spectrum is the entire range of wavelengths that make up electromagnetic radiation. The electromagnetic radiation spectrum includes X rays, ultraviolet radiation, visible light, infrared radiation, heat, microwaves and radio waves. Most of the wavelength's in the electromagnetic radiation spectrum are so small that they cannot be conveniently measured by familiar units such as inches or centimeters.
Scientists use the micron to describe electromagnetic radiation.
X rays and gamma rays are among the shortest wave lengths in the electromagnetic spectrum. Heat rays are on the longer end of the electromagnetic spectrum. Radio waves can be several feet to several miles long. A feedback mechanism is a process in which the factors that produce a result are modified by the result. In a positive feedback process the factors are strengthened by the result.