Modern Physics

What is modern physics?

Modern physics is a branch of physics which deals with the post-Newtonian concepts in world of physics. It is based on the two major breakthroughs of twentieth century: Relativity and Quantum Mechanics.

Modern physics often involves advance description of nature through new theories which were different from the classical descriptions and involves elements of quantum mechanics and Einsteinian relativity. For instance, quantum effects typically involves distances related to atoms. On the other hand, relativistic effects typically involve velocities compared to the speed of light.

modern physics

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 most important ideas. One of the important work 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

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

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Practise This Question

A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1m/s so as to have same K.E. as that of the boy. The original speed of the man will be