試題詳解

12. An electron in the hydrogen atom makes a transition from the n=5 level to the n=2 level. What is the wavelength of the emitted photon? （q_e = –1.60×10⁻¹⁹ C, h=6.63×10⁻³⁴ J·s）
(A) 326 nm
(B) 435 nm
(C) 578 nm
(D) 662 nm
(E) 769 nm