Modern Physics: Its Key Subjects and Principles
“Physics has evolved and continues to evolve without any single strategy”, while its ultimate goal to find a unified set of principles and laws governing force and energy, matter and change, at micro-, meso– and macro-world (Physical Sciences, the New Encyclopedia Britannica, 25, Knowledge in Depth, Chicago-Toronto, Encyclopedia Britannica, Inc., 1994 ).
Generally, the key achievements in physical science lie in the serendipitous and intuitive and ingenious discovering of empirical physical laws and effects, subatomic entities, symmetry principles, conservation laws, or unified force fields (See Supplement 1. All Nobel Prizes in Physics. Available: https://www.nobelprize.org/nobel_prizes/physics/laureates/).
Modern physics was founded as an empirical synthesis of separate sciences: mechanics, optics, acoustics, electricity, magnetism, heat and studies of matter and its properties.
Meantime, the whole idea of physics consisted in the intuitive understanding that different forces of nature and forms of energy are INTERRELATED and INTERCONVERTIBLE, but these universal phenomena have never been expressly formulated as the basic laws of nature. The Faraday’s intuitive belief in the unity of the forces of nature, or that all the forces of nature are but manifestations of a single universal force and must be convertible one into another made possible the classical electromagnetic field theory, the foundation of modern physics.