THEORIES

Theoretical Physics

Physics theories provide the basis upon which all of physics is built. As more theories are presented, experiments test them, attempting to falsify them and ultimately prove them ... but before this process can begin, the theory has to exist.

1. Fundamentals of Theoretical Physics
2. Classical Physics Laws
3. Modern Astronomical Theories
4. Quantum Physics
5. A Theory of Everything - Quantum Gravity Theory

Fundamentals of Theoretical Physics

When attempting to develop of physical theory, scientists follow the concepts defined in the scientific method. These are not hard and fast rules, but rather a set of guidelines that remind the scientist that great care must be used in carrying out the study of science.

• Introduction to the Scientific Method
• Hypothesis, Model, Theory, and Law
• Idealized Models
• Five Great Problems of Theoretical Physics

Classical Physics Laws

Some theories have weathered the test of time and moved from the realm of theoretical conjecture to become a cornerstone of the very foundation of scientific knowledge.

• Major Laws of Physics
• Introduction to Newton's Laws of Physics
• Newton's Law of Gravity
• Kepler's Laws of Planetary Motion
• Laws of Thermodynamics

Modern Astronomical Theories

Astronomy is a field which has a great deal of questions ... probably because it's so darn big! From the beginning of the universe until now, the universe is full of questions and scientists continue to search for answers.

• Einstein's Theory of Relativity
• What Is the Big Bang Theory?
• What Is a Black Hole?

• What Is Hawking Radiation?
• Book Review - Endless Universe: Beyond the Big Bang
• Book Review - Many Worlds in One

Quantum Physics

The first half of the 20th century was spent refining quantum theory, which, along with Einstein's theory of relativity, represents the sum total of all of our knowledge about how matter and energy interact in the universe. The result? There are four basic interactions that can take place between particles.

• Quantum Physics Overview
• Fundamental Forces of Physics
• Wave Particle Duality
• Book Review - Quantum Enigma: Physics Encounters Consciousness

A Theory of Everything - Quantum Gravity Theory

One goal of modern physics, at least for some physicists, is to develop a comprehensive theory of everything, which reconciles gravity with the other three fundamental forces. Such a theory would have to define the nebulous boundary between Einstein's theory of relativity and quantum theory, and is thus referred to as a theory of quantum gravity.

• What is Quantum Gravity?
• What Is Unified Field Theory?
• What Is String Theory?
• What is Loop Quantum Gravity?
• Book Review - The Trouble with Physics