What is the Difference Between Quantum Physics and Quantum Mechanics?

Quantum physics and quantum mechanics are related but distinct terms. Both terms refer to the study of subatomic particles and their behavior, but there are some differences between them:

1. Focus: Quantum physics is a broader term that encompasses the study of theories like quantum mechanics. Quantum mechanics, on the other hand, is a specific branch of quantum physics that deals with the mathematical laws governing subatomic particles.
2. Mathematical Laws: Quantum mechanics was formulated into mathematical laws in the 1920s, primarily by Erwin Schrodinger and Werner Heisenberg. These laws describe the behavior of quantum particles, which do not follow the laws of classical mechanics.
3. Historical Development: Before the development of mathematical laws governing subatomic particles, the field was called "quantum theory" or "quantum physics." The term "quantum mechanics" was adopted once these mathematical laws were established.

In summary, quantum physics is a major branch of science that includes the study of theories like quantum mechanics, while quantum mechanics is a specific branch of quantum physics that focuses on the mathematical laws governing subatomic particles.

Comparative Table: Quantum Physics vs Quantum Mechanics

The terms "quantum physics" and "quantum mechanics" are often used interchangeably to describe the study of subatomic particles. However, there is a subtle difference between the two:

• Quantum Physics: This is a more general term that encompasses the overall field of studying subatomic particles and their behavior. It includes various approaches and theories related to quantum phenomena.

• Quantum Mechanics: This is a more specific term that refers to the mathematical laws and principles governing the behavior of subatomic particles. These laws were developed in the 1920s by physicists like Erwin Schrödinger and Werner Heisenberg. Quantum mechanics is the application of these mathematical laws to describe and predict the behavior of quantum systems.

In summary:

Both quantum physics and quantum mechanics are essential for understanding the behavior of subatomic particles and are often used together in research and discussions.