There are two major divisions of physics: classical and modern. Within classical physics, the major subdivisions are mechanics, thermodynamics, acoustics, optics, electricity and magnetism. The subdivisions of modern physics consist of chaos theory, relativity, string theory, cryogenics, crystallography and nanotechnology. The field also includes quantum-level, atomic, molecular, chemical, computational, high-energy, high-pressure and laser physics.Know More
Classical physics is often described as the study of physics on the macroscopic level, meaning questions are generally investigated without the aid of highly technological equipment, such as electron microscopes. The inception of classical physics dates back to the late 1500s. Mechanics is the oldest subdivision of classical physics. The field is inspired by the work of Isaac Newton.
The study of modern physics takes place at the sub-microscopic level. This division of physics investigates the behavior of very small particles, such as electrons and atoms. Modern physics developed in the early 1900s when physicists began to realize that the laws of classical physics did not always hold true for sub-microscopic particles. Notable advances in modern physics include Einstein's theories of relativity and Heisenberg's principle of indeterminacy. Because even the world's most advanced microscopes cannot make sub-microscopic particles visible, expensive tools and equipment, such as particle accelerators, are required to explore the world at this level.Learn more about Physics
The work of Sir Isaac Newton revolutionized science and laid the foundations of modern mathematics and physics. Among his accomplishments are the formulation of the laws of motion and gravitation, the development of calculus and the invention of the first reflecting telescope.Full Answer >
In physics, aÂ derived unit is a unit expressedÂ algebraically usingÂ base units. In the metric system, the SI base units for length, mass, time and electric current are respectively meter, kilogram, second and amp. Some derived units from these base units are area, volume, density, acceleration and frequency.Â Â Â Full Answer >
Quantum physics, also referred to as quantum mechanics, is "A theory of matter that is based on the concept of the possession of wave properties by elementary particles," according to Merriam-Webster. Quantum physics deals with the behavior of light and matter at a subatomic and atomic level.Full Answer >
Khan Academy has an extensive video library of physics lessons available online for free. The lessons range from basic one-dimensional motion to more advanced topics, such as thermodynamics and geometric optics.Full Answer >