When we read a book, we come across important and useful statements, writeups and comments etc which are found only in masterpieces. This repository collects a brief introduction to such pieces of articles, from books by masters and other external sources. Frequently, one, or more questions are asked and a brief answer is given. Reference to the original work is provided for further details.

# Handout/note

For page specific messages

For page specific messages

Class/lecture notes or handouts.

- Non degenerate Perturbation Theory
- Perturbation Theory for Degenerate Case
- Application to Fine Structure of Hydrogen Atom

- Non degenerate Perturbation Theory
- Perturbation Theory for Degenerate Case
- Application to Fine Structure of Hydrogen Atom

QM-Lecture Notes-19

Quantum Theory of Scattering - Partial Wave Analysis

QM-Lecture Notes-19

Quantum Theory of Scattering - Partial Wave Analysis

Quantum Mechanics Lecture Notes-17 HOME PAGE

Addition of Angluar Momenta

- Statement of the Problem
- Main Results on Addition of Angular Momenta
- Examples of Constructing \(\vert JM \rangle \) States