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.
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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.
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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 | \(\begin{array}{l}ln\frac{N_{t}}{N_{0}}=-kt\end{array} \) |
In this video, we provide an in-depth analysis of PYQs of Modern Physics for JEE 2024
Frequently Asked Questions – FAQs
What is modern physics?
What is the photoelectric effect?
Who is the father of modern physics?
What is black body radiation?
What is wien’s displacement law?
What was the purpose of the Davisson-Germer Experiment?
What is Work Function?
Laws of Physics can be articulated based on _____________ according to Einstein’s Special Theory of Relativity.
a) Quantum state
b) Non-inertial frame of reference
c) Inertial frame of reference
d) None of these
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