O'Reilly logo

Principles of Quantum Mechanics by Dr Singh Tyagi

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 1

Introduction

Man’s mind once stretched by a new idea, never regains its original dimension.

—Oliver Wendell Holmes

1.1  MOTIVATION

Physics deals with the study of behaviour of physical systems under various conditions. It boils down to the study of nature of interactions between particles—the constituents of physical systems—and the consequences thereof. At macroscopic level, almost all observed phenomena have been explained by invoking the laws of Newtonian mechanics, which is generally known as ‘classical mechanics’.

The very natural question which comes to our mind is ‘What is the need of any other mechanics (e.g. quantum mechanics) when very profound and well-tested mechanics (i.e. classical mechanics) is already there?’ For centuries, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required