A basic level Quantum Mechanics book for beginners in UG & PG Physics. In fact Quantum Mechanics is not Mathematics. But many teachers even now treating this subject as Mathematics. It has its own concepts and ideas. Without this understanding one cannot excel in Quantum Mechanics. Inadequacy of classical physics led to Quantum Mechanics and it was able to prove the mechanics in microlevel. Mathematics can be used as a language for understanding. After estimating wave function, the physics behind it has to be understood. For this authors tried to avoid mathematical steps. But included all...