Calculate the Frequency of the Light Emitted by a Hydrogen

Multiple Choice

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level. Recall that for hydrogen E_n = -2.18 × 10^-18 J(1/n² ) . (h = 6.63 × 10^-34 J • s)

A) 3.08 × 10¹⁵ s^-1
B) 1.03 × 10⁸ s^-1
C) 2.06 × 10¹⁴ s^-1
D) 1.35 × 10^-51 s^-1
E) 8.22 × 10¹⁴ s^-1