Addiction: Central nervous system (CNS) stimulants are addictive, even if they are not abused. Many factors, including the patient's personal history, the type of stimulant that is being taken, the dose of the drug, and duration of use, influence how likely an individual is to become addicted.
The source of all waves - mechanical or electromagnetic - is something that is vibrating. Matthew Donovan.
4XHVWLRQSRLQW Radiant energy is the source of electromagnetic waves, which include X-ray, infrared, and ultraviolet waves among others. The diagram below shows the electromagnetic spectrum.