A hydrogen atom initially in ground state absorbs a photon, which excites it to the n=4 level. Determine the wavelength and frequency of the photon.
a) Wavelength: λ = RH (1/4² - 1/n²), Frequency: ν = c/λ
b) Wavelength: λ = RH (1/n² - 1/4²), Frequency: ν = c/λ
c) Wavelength: λ = RH (1/n² - 1/2²), Frequency: ν = c/λ
d) Wavelength: λ = RH (1/2² - 1/n²), Frequency: ν = c/λ