Specific purpose: To inform and give further explanation of the concept and the principles of the theory of relativity in the physical science field.
Thesis statement: Albert Einstein, as the founder of the theory of relativity, he has discovered that distance and time are not absolute and the equivalent principle of the forces of gravity and acceleration.
Relativity, theory, developed in the early 20th century, which originally attempted to account for certain anomalies in the concept of relative motion, but which in its ramifications has developed into one of the most important basic concepts in physical science. Albert Einstein, as the founder of the theory of relativity, he has discovered that distance and time are not absolute and the equivalent principle of the forces of gravity and acceleration. The function and the concepts of this theory will be clarified in the following. .
. The theory of relativity proposed that distance and time are not absolute .
A. The velocity of an object depends on the motion of observer.
B. The gravity can affect the interval of time and space as well as motion.
á. The key idea of relativity is called the Equivalence Principle.
A. When the gravity is pulling in one direction is completely equivalent to an acceleration in the opposite direction.
B. The gravity of any mass, such as sun, has the effect of warping (twisting) the space and time around it. .
Since the theory of relativity has been discovered it has also been applied on the electromagnetic, astronomy, and other field relate to the science. It was definitely the most important progress of our modern science in this century. .