Definition of vibration
Vibration is a ubiquitous phenomenon in the universe. It is divided into macroscopic vibrations (such as earthquakes and tsunamis) and microscopic vibrations (thermal motion of elementary particles, Brownian motion). Some vibrations have relatively fixed wavelengths and frequencies, and some vibrations have no fixed wavelengths and frequencies. Two objects with the same vibration frequency, one of which can cause another object to produce the same frequency of vibration when vibrating. This phenomenon is called resonance. The resonance phenomenon can bring many benefits and harms to human beings. Different atoms have different vibration frequencies and emit spectra at different frequencies, so it is possible to find out which elements a substance contains through a spectrum analyzer. At normal temperature, the magnitude of the particle's vibration determines the morphology of the material (solid, liquid, and gaseous). Different materials have different melting points, freezing points and vaporization points which are also determined by the different vibration frequencies of the particles. The temperature we usually say is the vibration amplitude of air particles. Any vibration requires a source of energy, and no vibration will occur without an energy source. The absolute zero degree specified by physics is the temperature at which the elementary particles cannot vibrate, and the lowest temperature of the universe. The principle of vibration is widely used in music, construction, medical, manufacturing, building materials, exploration, military and other industries. There are many small branches. The in-depth study of any branch can promote the forward development of science and promote social progress.