試題詳解

15. The wavelength of light associated with the n = 2 to n = 1 electron transition in the hydrogen spectrum is 1.216 x 10^-7 m. By what coefficient should this wavelength be multiplied to obtain the wavelength associated with the same electron transition in the Li²⁺ ion?
(A) 1/9
(B) 1/7
(C) 1/4
(D) 1/3
(E) 1