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Physics - Classical And Modern Physics, Divisions Of Physics, Interrelationship Of Physics To Other Sciences, Physics And Philosophy

physicist scientists matter nature

Physics is the science that deals with matter and energy and with the interaction between them. Physics, from which all other sciences derive their foundation, were the first attempts to provide rational explanations for the structure and workings of the Universe.

Even in the earliest civilizations, physics allowed a mechanism to understand and quantify nature.

An axiom among physicists—since the writings of Italian astronomer and physicist Galileo Galilei (1564–1642)—provides that the road to sure knowledge about the natural world is to carry out controlled observations (experiments) that will lead to measurable quantities. It is for this reason that experimental techniques, systems of measurements, and mathematical systems for expressing results lie at the core of research in physics.

In Ancient Greece, in a natural world largely explained by mystical and supernatural forces (i.e., the whim of Gods), the earliest scientists and philosophers of record dared to offer explanations of the natural world based on their observations and reasoning. Pythagoras (582–500 B.C.) argued about the nature of numbers, Leucippus (c. 440 B.C.), Democritus (c. 420 B.C.), and Epicurus (342–270 B.C.) asserted matter was composed of extremely small particles called atoms.

Many of the most cherished arguments of ancient science ultimately proved erroneous. For example, in Aristotle's (384–322 B.C.) physics, for example, a moving body of any mass had to be in contact with a "mover," and for all things there had to be a "prime mover." Errant models of the universe made by Ptolemy (ca. A.D 87–145) were destined to dominate the Western intellectual tradition for more than a millennium. Midst these misguided concepts, however, were brilliant insights into natural phenomena. More then 1700 years before the Copernican revolution, Aristarchus of Samos (310–230 B.C.) proposed that the earth rotated around the Sun and Eratosthenes Of Cyrene (276–194 B.C.), while working at the great library at Alexandria, deduced a reasonable estimate of the circumference of the earth.

Until the collapse of the Western Roman civilization there were constant refinements to physical concepts of matter and form. Yet, for all its glory and technological achievements, the science of ancient Greece and Rome was essentially nothing more than a branch of philosophy. Experimentation would wait almost another two thousand years for injecting its vigor into science. Although there were technological advances and more progress in civilization that commonly credited, during the Dark and Medieval Ages in Europe science slumbered. In other parts of the world, however, Arab scientists preserved the classical arguments as they developed accurate astronomical instruments and compiled new works on mathematics and optics.

At the start of the Renaissance in Western Europe, the invention of the printing press and a rediscovery of classical mathematics provided a foundation for the rise of empiricism during the subsequent Scientific Revolution. Early in the sixteenth century Polish astronomer Nicolaus Copernicus's (1473–1543) reassertion of heliocentric theory sparked an intense interest in broad quantification of nature that eventually allowed German astronomer and mathematician Johannes Kepler (1571–1630) to develop laws of planetary motion. In addition to his fundamental astronomical discoveries, Galileo made concerted studies of the motion of bodies that subsequently inspired seventeenth century English physicist and mathematician Sir Isaac Newton's (1642–1727) development of the laws of motion and gravitation in his influential 1687 work, Philosophiae Naturalis Principia Mathematica (Mathematical principles of natural philosophy)

Following Principia, scientists embraced empiricism during an Age of Enlightenment. Practical advances spurred by the beginning of the Industrial Revolution resulted in technological advances and increasingly sophisticated instrumentation that allowed scientists to make exquisite and delicate calculations regarding physical phenomena. Concurrent advances in mathematics, allowed development of sophisticated and quantifiable models of nature. More tantalizingly for physicists, many of these mathematical insights ultimately pointed toward a physical reality not necessarily limited to three dimensions and not necessarily absolute in time and space.

Nineteenth century experimentation culminated in the formulation of Scottish physicist James Clerk Maxwell's (1831–1879) unification of concepts regarding electricity, magnetism, and light in his four famous equations describing electromagnetic waves.

During the first half of the twentieth century, these insights found full expression in the advancement of quantum and relativity theory. Scientists, mathematicians, and philosophers united to examine and explain the innermost workings of the universe—both on the scale of the very small subatomic world and on the grandest of cosmic scales.

By the dawn of the twentieth century more than two centuries had elapsed since the Newton's Principia set forth the foundations of classical physics. In 1905, in one grand and sweeping theory of Special relativity German-American physicist Albert Einstein (1879–1955) provided an explanation for seemingly conflicting and counterintuitive experimental determinations of the constancy of the speed of light, length contraction, time dilation, and mass enlargements. A scant decade later, Einstein once again revolutionized concepts of space, time and gravity with his General theory of relativity.

Prior to Einstein's revelations, German physicist Maxwell Planck (1858–1947) proposed that atoms absorb or emit electromagnetic radiation in discrete units of energy termed quanta. Although Planck's quantum concept seemed counter-intuitive to well-established Newtonian physics, quantum mechanics accurately described the relationships between energy and matter on atomic and subatomic scale and provided a unifying basis to explain the properties of the elements.

Concepts regarding the stability of matter also proved ripe for revolution. Far from the initial assumption of the indivisibility of atoms, advancements in the discovery and understanding of radioactivity culminated in renewed quest to find the most elemental and fundamental particles of nature. In 1913, Danish physicist Niels Bohr (1885–1962) published a model of the hydrogen atom that, by incorporating quantum theory, dramatically improved existing classical Copernican-like atomic models. The quantum leaps of electrons between orbits proposed by the Bohr model accounted for Planck's observations and also explained many important properties of the photoelectric effect described by Einstein.

More mathematically complex atomic models were to follow based on the work of the French physicist Louis Victor de Broglie (1892–1987), Austrian physicist Erwin Schrödinger (1887–1961), German physicist Max Born (1882–1970), and English physicist P.A.M Dirac (1902–1984). More than simple refinements of the Bohr model, however these scientists made fundamental advances in defining the properties of matter—especially the wave nature of subatomic particles. By 1950, the articulation of the elementary constituents of atoms grew dramatically in numbers and complexity and matter itself was ultimately to be understood as a synthesis of wave and particle properties.

The end of WWII gave formal birth to the atomic age. In one blinding flash, the Manhattan Project created the most terrifying of weapons that could—in a blinding flash—forever change course of history.


[back] Physics - Middle Ages, Sixteenth And Seventeenth Centuries, Eighteenth Century, Nineteenth Century, Causes Of Motion: Medieval Understandings

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about 5 years ago

UNIFIED FIELD and FOUR FORCES

In fact, there is not a gravitational field. But there is an energy field. This interaction of energy to mass/particle, mass/particle will cause of shows some resistance to energy and accelerates. This acceleration is direction of the energy and this acceleration is proportional with the energy. There are no weights of the mass in space. Masses accelerate easily, even in very small effects. All this depends to direction of flow and shape of energy from mass. On the other hand, we know that an object shrinks when they lost their energy. In the same way that, radiant mass accelerates into the interior of their own. The mass effects distance to the other mass. Masses/Particles accelerate when they receive the energy. Frictionless space, all objects, this effect cause of movements direction of across to the mass. This acceleration is proportional with the energy. The connection between mass/particle and energy:
E=ma
The forces acting on the formation of the universe today is composed of modern physics, has accepted the four basic forces. These forces had been the main reason in the formation of all the systems in the Universe. Formations such as the have level of quantum particles is the largest, mass formation, to stand together, relationships with each other, always with the presence of these forces has been possible. To date, the four forces of various theorems about the mechanics of what are being introduced and how it works, but what precisely determined.
1. Strong Nuclear Force
2. Weak Nuclear Force
3. Electromagnetic force
4. Gravity (Gravitational Force)
Masses of force application remotely to each other, especially as Newton had many physicists disturbed. But; Newton's ideas results in many practical applications, valid until 20th Century. German-born physicist Albert Einstein, General Relativity theory of matter by presence of four-dimensional space-time bends, but the four-dimensional space-time suggested that this change is observes as if a force implements. Which is a part of the standard model of particle physics, quantum color dynamics, the SU (3) the so-called local (setting) built on the symmetry group of a non setting theory Abelian. Strong interaction coupling constant is determiner via the strong force. Load and the distance between interacting particles, the color coupling constant / interaction energy depends on the
size. Quarks and gluons carry color charge and the only fundamental particles that can enter are calling the strong interaction.
Now try to figure out what are these forces. The mass effects distance to the other mass. How is this possible? As we know masses expands in heat when they receive the energy. For example, electrical wires, bridges, get longer in hot weather. Now imagine that this effect applies to a mass in space.Face of the rail to the sun in space. This rail will begin to get longer in the opposite direction of energy (acceleration) because of the energy is coming from the sun. Frictionless space, all objects, this effect cause of movements direction of across to the mass.
1.1 Expansion in Solids
When an object heats, the molecules or atoms begins moving more. For this reason, begins to grow and expand.

1.1.a Longitudinal Elongation
Heated in a metal bar before the first length, be L0. When heating the metal bar of length L is length of this elongated. The amount of elongation in length (?L)
This effect caused the buoyancy of liquids too. m=dv There are no weights of the mass in space. Masses accelerate easily, even in very small effects. All this depends on the direction of flow and shape of energy from mass. Wherever, it is possible to make this experiment with any mass. On the other hand, we know that an object shrinks when they lost their energy. In the same way that radiant mass accelerates into the interior of their own. The reason for this, the Molecules/ atoms shows resistance to energy accelerates towards to direction of energy. The shape of a raindrop, it is evidence.
In fact, there is not a gravitational field. But there is an energy field. Electromagnetic waves carry energy as they travel through in empty space. This interaction of energy to ‘’mass/particle’’, mass/particle will cause it shows some resistance to energy and accelerates. This acceleration is direction of the energy. ‘’All the mass and the particles’’ work with this mechanism. This acceleration is proportional with the energy.
Transport of energy by electromagnetic waves
Electromagnetic waves carry energy as they travel through space.
There is an energy density associated with both the electric and magnetic fields.
The rate of energy transport per unit area describes by the vector.

Two types of energy waves emitted from objects movement.

1 - Starts from the mass/particle as a circular ring-shaped wave and flows in space
2 - Starts from the mass/particle as a spiral wave and flows in space.
Energy spreads of the magnetic masses are as spiral wave. This is because arrangements of atoms in the mass.
WHY THE SAME POLES PUSHES EACH OTHER:

Energy spreads of the magnetic masses are as spiral wave. Spiral waves disrupt of the energy balance of the other mass. Therefore, energy flows from stable parts to unstable parts. So, the mass accelerates opposite direction. This is because the arrangement of atoms in the mass.
The connection between mass and energy: E=ma
As can see all over the force is actually a single force and energy-mass/particle relationship observes observes due to these forces. Effect of these forces that we perceive is not actually gravity, it is acceleration. According to Einstein's Equivalence law feel the gravity, this effect caused by acceleration. In vacuum between the stars and planets, we cannot know that we had travel in a spaceship; we feel "the gravity" effect, all the ship cannot be identified caused by the accelerated movement. Buoyancy of liquids, air movements and turbulence observes everything works with this mechanism. E=ma
Total interaction between two masses
m=dv (density and volume)
G=(m1+m2)a)/r²
The same mechanism operates in the black hole. Because of the intensive energy emissions mass accelerates into itself. Acceleration increases, also more energy radiates. For this reason masses accelerates more towards to the black hole.

The working mechanism of the black hole: E = ma
The basic mechanics of the forces to put out the scientific studies would in more rapid progress result. Everything exists due to these forces at the universe. It will be able to build antigravity vehicles via the correct identification of these forces In the future. Maybe one day we can travel to the black holes. The reason is that; the same mechanism works in the black holes.

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