529 \times 10^{-10} \, m \) is the Bohr radius, \( m^* = 0.55 \times m \) is the effective mass for germanium, and \( m = 9.11 \times 10^{-31} \, kg \) is the mass of an electron.
Substitute the values:
\[ R = \frac{0.529 \times 10^{-10}}{\sqrt{16 \times 0.55}}
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