Advanced quantum mechanics,Approximation theory, Time-dependent perturbation, Transition probability, selection rule, Allowed transition.
For free study material :https://pravegaa.com/free-study-material/modern-physics-and-quantum-mechanics/
For free problem solution :https://pravegaa.com/problems-solutions/modern-physics-and-quantum-mechanics/
For free test :https://pravegaa.com/free-test/modern-physics-and-quantum-mechanics/
