Positronium consists of an electron and a positron (a particle which has the same mass as an electron , but opposite charge ) orbiting round their common centre of mass. Calculate the value of the Rydberg constant for this system

Positronium consists of an electron and a positron (a particle which h

1.	Positronium consists of an electron and a positron (a particle which has the same mass as an electron , but opposite charge ) orbiting round their common centre of mass. Calculate the value of the Rydberg constant for this system
Answer» `R_oo //4` `R_oo //2` `2R_oo` `R_oo` ANSWER :B