Quantum Mechanics - Perturbation Theory

In perturbation theory, what is the first order correction to the energy of a hydrogen atom (Bohr radius a₀) in its ground state due to the presence of a static electric field E? 

A. 0
B. eEa₀
C. 3eEa₀
D. 8e²Ea₀³ / 3 
E. 8e²E²a₀³ / 3 

 (GR9277 #99) 

Solution



Answer: A