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) .

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