What is Physics?

The science of everything!

Broadly, physics involves the study of everything in physical existence, from the smallest subatomic particles to the entire universe. Physicists try to develop conceptual and mathematical models that describe interactions between entities (both big and small) and that can be used to extend our understanding of how the universe works at different scales. Studying for a BS in Physics gives a broad overview of the most well-established of these models, such as classical mechanics, thermodynamics, electromagnetism, and quantum mechanics, as well as the computational and experimental skills used in working with them. With this background you are ready to specialize in any sub-field, such as those described briefly below.

Some sub-fields of physics
Black hole
Astrophysics
The branch of astronomy dealing with the physics of the universe, such as the evolution of stars and galaxies. At the largest scale it studies cosmology, trying to understand the evolution and structure of  the whole universe.
American Astronomical Society
biophysics icon
Biophysics
Application of physics concepts and techniques to the study of living systems. This could be at the molecular, subcellular, cellular, or organism levels. Often has applicaitons to medicine.
Biophysical Society
large molecule simulation
Chemical Physics
Use of techniques from atomic, molecular, and solid state physics to study chemical processes. An emerging topic is the formation of nanoparticles.

APS Division of Chemical Physics
future car mock-up
Engineering Physics
Using a broad range of physics ideas to apply, design, and develop practical solutions to engineering challenges.
APS Applied Physics
gravity map of Earth
Geophysics
Using physics to study the origin, evolution, and current state of the Earth. The emerging field of planetary geoloy seeks to do the same for other planets.
American Geophysical Union
surface structure of material
Materials Science
Applying physics to study the relationship between the structure and properties of materials. New materials emerging from this field can have practical and economic benefits.
ASM International
working on medical scanner
Medical Physics
Using physics for the design of equipment and techniques used to study thehuman body, as well as diagnose and treat diseases. Examples include the development of MRI, CAT, and PET scanners, as well as radiation protection.
American Association of Physicists in Medicine
nuclear reaction
Nuclear Physics
The study of the structure of the atom's nucleus in terms of the interacitons betwen its constituent particles. Practical applications include medical diagnosis and treatment.
APS Division of Nuclear Physics
particle collision
Particle Physics
The study of the most fundamental particles of which all matter made. Ultimately the aim is to produce a unified model that relates all fundamental forces and elementary particles to each other.
APS Division of Particles and Fields

 

 

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