Laws and Theories
When I used to hear people use the phrase, “laws of physics”, I wondered why they didn’t say “laws of science ” instead? I mean, why exclude chemistry and biology? Later I learnt that the reason is that physics deals with fundamental concepts. And the other sciences are built on top of physics. For example, physics talks about the basic building blocks like quarks and electrons and photons (Well, ok, they keep breaking everything further and further…but that doesn’t change the point being made). Chemistry, on the other hand, is all about how combinations of building blocks behave. And biology is one level higher still than chemistry. Then I noticed the terminology difference. Until the 20 th century, every major concept of physics was called a “law”. Like the Second Law of Thermodynamics and Newton’s Laws of Gravitation. On the other hand, the most famous physics concepts of the 21 st century are called “theories”, not “laws”. Like the Theory of Quantum Mechanics and the Theory ...