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Light Passes Through a Pair of Very Thin Parallel Slits

Question 17

Multiple Choice

Light passes through a pair of very thin parallel slits. The resulting interference pattern is viewed far from the slits at various angles θ relative to the centerline coming outward from the midpoint between the slits. The central bright fringe is at θ = 0°. If the central bright fringe has intensity I0, what is the intensity of the next bright fringe on either side of it?


A) I0
B) I0/ Light passes through a pair of very thin parallel slits. The resulting interference pattern is viewed far from the slits at various angles θ relative to the centerline coming outward from the midpoint between the slits. The central bright fringe is at θ = 0°. If the central bright fringe has intensity I<sub>0</sub>, what is the intensity of the next bright fringe on either side of it? A) I<sub>0</sub> B) I<sub>0/</sub> <sub> </sub> C) I<sub>0</sub>/2 D) I<sub>0 </sub>cos 15° E) I<sub>0 </sub>cos<sup>2</sup> 15°
C) I0/2
D) I0 cos 15°
E) I0 cos2 15°

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