In sommerfeld's modification of Bohr's theory , the trajectory of an electron in a hydrogen atom is

In sommerfeld's modification of Bohr's theory , the trajectory of an e

1.	In sommerfeld's modification of Bohr's theory , the trajectory of an electron in a hydrogen atom is
Answer» A PERFECT ELLIPSE A CLOSED ellipse like curve, narrower at the perihelion position and flatter at the aphelion position A closed LOOP ona spherical surface A rosette Answer :B