The ground-state energy of positronium is most nearly equal to
A. − 27.2 eV
B. − 13.6 eV
C. − 6.8 eV
D. − 3.4 eV
E. 13.6 eV
Solution:
Energy levels of Positronium is half those of Hydrogen (See GR8677 #99)
En(H) = − 13.6 / n²
En(Ps) = ½ En(H)
For the ground-state n = 1 → EPs = − ½ × 13.6 eV = − 6.8 eV
Answer: C
A. − 27.2 eV
B. − 13.6 eV
C. − 6.8 eV
D. − 3.4 eV
E. 13.6 eV
(GR9677 #12)
Energy levels of Positronium is half those of Hydrogen (See GR8677 #99)
En(H) = − 13.6 / n²
En(Ps) = ½ En(H)
For the ground-state n = 1 → EPs = − ½ × 13.6 eV = − 6.8 eV
Answer: C
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