Calculate the Wavelength of the Light Emitted by a Hydrogen

Multiple Choice

Calculate the wavelength 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) 6.8 * 10^-18 nm
B) 0.612 nm
C) 82.6 nm
D) 97.2 nm
E) 365 nm