23. Which one of the following statements is true if the intensity of a light beam is increased while its frequency is kept the same?
(A) The photon gains higher speeds.
(B) The energy of photons is increased.
(C) The number of photons per unit time in increased.
(D) The wavelength of the light is increased.
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統計: 尚無統計資料
統計: 尚無統計資料