試題詳解

63. Which of the following statements is true?
(A) The energy of electromagnetic radiation increases as its frequency decreases.
(B) An electron in the n = 4 state in the hydrogen atom can go to the n = 2 state by absorbing electromagnetic radiation at the appropriate frequency.
(C) The frequency and wavelength of electromagnetic radiation are proportional to each other.
(D) The energy of an atom is increased when electromagnetic radiation is emitted from it.
(E) An excited atom can return to its ground state by emitting electromagnetic radiation.