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Unformatted text preview: Theory Question 1 Page 1 of 5 Theory Question 1: Gravity in a Neutron Interferometer Enter all your answers into the Answer Script . a a a a 2 2 BS BS M M BS - Beam Splitters M - Mirror IN OUT2 OUT1 Figure 1a OUT1 IN OUT2 Figure 1b Physical situation We consider the situation of the famous neutron-interferometer experiment by Collela, Overhauser and Werner, but idealize the set-up inasmuch as we shall assume perfect beam splitters and mirrors within the interferometer. The experiment studies the effect of the gravitational pull on the de Broglie waves of neutrons. The symbolic representation of this interferometer in analogy to an optical interferometer is shown in Figure 1a. The neutrons enter the interferometer through the IN port and follow the two paths shown. The neutrons are detected at either one of the two output ports, OUT1 or OUT2. The two paths enclose a diamond-shaped area, which is typically a few cm 2 in size....
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