The wave number of the spectral line in the emission spectrum of hydrogen will equal to $\dfrac{8}{9}$ times the Rydberg's constant if the electron jumps from ______.
n = 10 to n = 1
n = 3 to n = 1
n = 2 to n = 1
n = 9 to n = 1
The wave number of the spectral line in the emission spectrum of hydrogen will equal to $\dfrac{8}{9}$ times the Rydberg's constant if the electron jumps from ______.