Modern physics

Definition

Modern physics is a branch of physics that deals with post-Newtonian concepts, including quantum mechanics and relativity. It seeks to explain phenomena that classical physics cannot.

5 Must Know Facts For Your Next Test

1. Modern physics includes two major theories: quantum mechanics and the theory of relativity.
2. Quantum mechanics describes the behavior of particles at the atomic and subatomic levels.
3. The theory of relativity, developed by Albert Einstein, addresses the relationship between space and time.
4. Key experiments such as the photoelectric effect and double-slit experiment have shaped modern physics.
5. Modern physics has led to technological advancements like semiconductors, lasers, and nuclear energy.

Review Questions

• What are the two major theories that constitute modern physics?
• How does quantum mechanics differ from classical mechanics?
• Name one key experiment that contributed to the development of modern physics.

Related terms

Quantum Mechanics: A fundamental theory in physics describing physical properties of nature at small scales, typically atomic and subatomic levels.

Theory of Relativity: A theory formulated by Albert Einstein which encompasses both special relativity and general relativity, describing how space and time are interconnected.

Photoelectric Effect: $Phenomenon where electrons are emitted from a material when it is exposed to light. This effect provided evidence for the particle nature of light.$