Things You Need To Know in Physics
These are the things that you need to know in Physics!
1. Classical Mechanics
Widely known as the Newtonian mechanics, classical mechanics is one of the two sub-major fields of mechanics together with the quantum mechanics. Under the equilibrium of the bodies or forces, classical mechanics deal with its motions. It is a study of physical laws that describes different motions of the bodies under several systems of forces. In classical mechanics, the central concepts include mass, force, and motion. This sub-major field of mechanics’ foundation is the three Newton’s laws of motion.
Accompanied by a transfer of energy that travels through mass or space, a wave in physics is an oscillation. It has two major types which include electromagnetic waves and mechanical waves. The electromagnetic waves consist of electrical and magnetic fields periodic oscillations that are generated by charged particles and do not require a medium. While the mechanical waves needs a medium to propagate and its substance is deformed. Some examples of mechanical waves include waves on strings, acoustic waves, water waves, seismic waves, and shock waves. While the electromagnetic waves have different types of radiation which include infrared, ultraviolet, X-rays, visible light, radio waves, and microwaves.
3. Harmonic Oscillator
The harmonic oscillator is part of the classical mechanics that is defined as a system that experiences a restoring force (F) that is proportional to the displacement of x and where k is a positive constant. The motion in harmonic oscillator is periodic while the restoring force is oppositely directed and proportional to the displacement. The key concepts of harmonic oscillator include frequency, complex exponential, liner, non-linear, and amplitude.
5. Special Relativity
Regarding the relationship between time and space, special relativity is the generally accepted physical theory which is also known as the special theory of relativity. This theory is based on two postulates, the first one is that the laws of physics are invariant in all inertial systems; and the second one states that the speed of light in a vacuum is the same, regardless of the motion of the source of light, for all observers.