GRE Physics GR 1777, Problem 023 Solution

GRE Physics GR 1777 Problem Solution

023. Quantum Mechanics (Positronium)

You should know about

  • Rydberg constant for positronium may be calculated from the reduced mass

R_M = R_\infty \Big( \frac{M}{m_e + M} \Big) = R_\infty \Big( 1 + \frac{m_e}{M} \Big)^{-1}

Solution

Answer

(B) 0.5 R_\infty

Reference

https://en.wikipedia.org/wiki/Positronium

https://en.wikipedia.org/wiki/Rydberg_constant

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