Physics

1. What is Physics it’s really difficult to define exactly what physics is. For one, physics keeps changing as we progress and make new discoveries. New theories don't just bring new answers. They also create new questions that might not have even made sense when viewed from within the previous theory of physics. This makes physics exciting and interesting, but it also forces attempts at defining physics into generalizations about what physics has been rather than what it might be at some point in the future.

3. Branches of Physics Classical physics Modern physics Nuclear physics Atomic physics Geophysics Biophysics Mechanics Acoustics Optics Thermodynamics Astrophysics

4. Classical Physics This branch of physics is mainly concerned with the laws of motion and gravitation as outlined in Sir Isaac Newton and James Clark Maxwell’s kinetic theory and thermodynamics, respectively. This branch of physics deals mostly with matter and energy. Often, physics which date before 1900 are considered classical physics, whereas physic which date after 1900 are considered modern physics.

5. Modern Physics Modern physics is a branch of physics that is mainly concerned with the theory of relativity and quantum mechanics. Albert Einstein and Max Plank were the pioneers of modern of physics as the first scientists to introduce the theory of relativity and quantum mechanics, respectively. In modern physics, energy and matter are not considered as separate entities What Are the Two Pillars of Modern Physics? The two pillars of modern physics are as follows. Albert Einstein's theory of relativity Max Plank's quantum theory.

6. Nuclear Physics Nuclear physics is a branch of physics that deals with the constituents, structure, behaviour and interactions of atomic nuclei. This branch of physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons. According to the Microsoft Encarta encyclopedia, nuclear physics is defined as: “The branch of physics in which the structure, forces, and behaviour of the atomic nucleus are studied.”

7. Atomic Physics Atomic physics is a branch of physics that deals with the composition of the atom apart from the nucleus. It is mainly concerned with the arrangement and behaviour of electrons in the shells around the nucleus. Thus, atomic physics mostly examines electrons, ions, and neutral atoms. One of the earliest steps towards atomic physics was recognizing that all matter is comprised of atoms. The true beginning of atomic physics is marked by the discovery of spectral lines and the attempt to explain them. This resulted in an entirely new understanding of the structure of atoms and how they behave.

8. Geophysics Geophysics is a branch of physics that deals with the study of the Earth. It is mainly concerned with the shape, structure and composition of the Earth, but geophysicists also study gravitational force, magnetic fields, earthquakes, magma, and more. Geophysics was only recognized as a separate discipline in the 19th century, but its origins date back to ancient times. 

9. Biophysics According to the Microsoft Encarta encyclopedia, biophysics is defined as: “the interdisciplinary study of biological phenomena and problems, using the principles and techniques of physics.” Biophysics studies biological problems and the structure of molecules in living organisms using techniques derived from physics. One of the most groundbreaking achievements of biophysics is the discovery of the structure of DNA (Deoxyribonucleic Acid) by James Watson and Francis Crick.

10. Mechanical Physics Mechanical physics is a branch of physics that deals with the motion of material objects under the influence of forces. Often called just mechanics, mechanical physics falls under two main branches: Classical mechanics Quantum mechanics

11. Acoustics The word "acoustics" isderived from a Greek word akouen, meaning "to hear." Hence, we can define acoustics as a branch of physics that studies how sound is produced, transmitted, received and controlled. Acoustics also deals with the effects of sounds in various mediums (i.e. gas, liquid, and solids). Optics Optics is a branch of physics that studies electromagnetic radiation (for example, light and infrared radiation), its interactions with matter, and instruments used to gather information due to these interactions. Optics includes the study of sight.

12. Thermodynamics Thermodynamics is a branch of physics that deals with heat and temperature and their relation to energy and work. The behaviour of these quantities is governed by the four laws of thermodynamics. Astrophysics The word "astrophysics" is a combination of two Latin-derived words: astro, which means "star," and phisis, whichmeans "nature." Thus, astrophysics can be defined as a branch of astronomy which is concerned with the study of universe (i.e., stars, galaxies, and planets) using the laws of physics.

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