15. Which statement regarding an interferometer is FALSE?
(A) Radiation from the source is split； some is reflected to a stationary mirror and some is
transmitted to a movable mirror.
(B) Constructive interference occurs whenever O is an integer multiple of the wavelength.
(C) A minimum occurs when 6 is a half-integer multiple of the wavelength.
(D) Radiation reaching the detector goes through a series of maxima and minima as the
mirror moves from the beamsplitter at a constant speed.
(E) All of the statements are true.
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