物理专业英语绪论_物理学专业英语
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Introduction
Physics is a natural science that involves the study of matter and its motion through spacetime(时空), as well as all applicable concepts, such as energy and force.More broadly, it is the general analysis of nature, conducted in order to understand how the world and universe behave.Physics is one of the oldest academic disciplines(学科), perhaps the oldest through its inclusion of astronomy.Over the last two millennia(一千年), physics had been considered synonymous with philosophy, chemistry, and certain branches of mathematics and biology, but during the Scientific Revolution in the 16th century, it emerged(显现)to become a unique modern science in its own right.However, in some subject areas such as in mathematical physics and quantum chemistry, the boundaries of physics remain difficult to distinguish.Physics is both significant and influential, in part because advances in its understanding have often translated into new technologies, but also because new ideas in physics often resonate(共鸣)with other sciences, mathematics, and philosophy.For example, advances in the understanding of electromagnetism(电磁学)or nuclear physics led directly to the development of new products which have dramatically transformed modern-day society;advances in thermodynamics(热力学)led to the development of motorized transport;and advances in mechanics(力学)inspired the development of calculus.Scope and aims
Physics covers a wide range of phenomena,from the smallest sub-atomic particles, to the largest galaxies.Physics aims to describe the various phenomena that occur in nature in terms of simpler phenomena.Thus, physics aims to both connect the things observable to humans to root causes, and then to try to connect these causes together in the hope of finding an ultimate reason for why nature is as it is.For example, the ancient Chinese observed that certain rockswere attracted to one another by some invisible force.This effect was later called magnetism, and was first rigorously studied in the 17th century.A little earlier than the Chinese, the ancient Greeks knew of other objects such as amber, that when rubbed with fur would cause a similar invisible attraction between the two.This was also first studied rigorously in the 17th century, and came to be called electricity.Thus, physics had come to understand two observations of nature in terms of some root cause(electricity and magnetism).However, further work in the 19th century revealed that these two forces were just two different aspects of one force – electromagnetism.The scientific method
Physicists use the scientific method to test the validity(认可)of a physical theory.Theories which are very well supported by data and have never failed any competent empirical(以实验为依据的)test are often called scientific laws, or natural laws.Of course, all theories, including those called scientific laws, can always be replaced by more accurate, generalized statements if a disagreement of theory with observed data is ever found.
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