Positronium is an atom formed by an e and positron The mass of the position is same as that of cine and its charge is equal in magnitude but opposite in sign to that of an e. The positronium atom is thus similar to the H atom with the position replacing the proton. (1) The Binding energy of a positionium atom is (a) 13.6 ev (6) 6.8 ev (C) 27.2ev (d) 3.9 ev (1) If a positronium atom makes a transition from the state with n=3 to a state with n = 2, The energy of the photon that is i'm emitted in the transition is closest to (C) 27.2 ev (b) 0.94 ev (1) 2127 ev 1 (a) 1:88 ev H