Modern physics often involves an advanced description of nature through new theories which are different from the classical descriptions and involve elements of quantum mechanics and Einstein’s relativity.
Table of Contents |
What is Modern Physics?
Modern physics is a branch of physics that deals with the post-Newtonian concepts in the world of physics. It is based on the two major breakthroughs of the twentieth century: Relativity and Quantum Mechanics.
Quantum effects typically involve distances related to atoms. On the other hand, relativistic effects typically involve velocities compared to the speed of light.

Who is the Father of Modern Physics?
Albert Einstein is known as the father of modern physics. He was a 20th-century scientist, who came up with the most important ideas. One of the important works of Albert Einstein is the theory of relativity and the famous equation E=mc2.
He was awarded the Nobel Prize for physics in 1921 for his achievements in theoretical physics, particularly discovering the laws of photoelectric effect
The video about relative motion

Modern Physics Topics
The topics which are considered as the core to the foundation of the subject are stated below:
- Atomic theory and the evolution of the atomic model in general
- Black-body radiation
- Franck–Hertz experiment
- Geiger–Marsden experiment (Rutherford’s experiment)
- Gravitational lensing
- Michelson–Morley experiment
- Photoelectric effect
- Quantum thermodynamics
- Radioactive phenomena in general
- Perihelion precession of Mercury
- Stern–Gerlach experiment
- Wave-particle duality
- Solid
Modern Physics Formulas
Quantity | Formula |
Photoelectric effect | hf=Φ+Ek |
Black body radiation | \(\begin{array}{l}B_{v}(v,T)=\frac{2hv^{3}}{c^{2}}\frac{1}{e^{\frac{hv}{kT}}-1}\end{array} \) |
Energy of photon | E=hf |
Mass-energy | E=mc2 |
Radioactive half-life | \(\begin{array}{l}ln\frac{N_{t}}{N_{0}}=-kt\end{array} \) |
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