Concept explainers
Suppose that the width of the right slit were decreased (without changing the distance between the centers of the slits).
i. Would the intensity at each of the following points increase, decrease, or stay the same? In each case, explain your reasoning.
• point Q
• point R
ii. The graph of intensity (I) versus angle θ shown at right corresponds to the above double−slit experiment. (The angle θ is measured relative to the normal to the screen.)
In the space at right, show how the intensity graph would be different if the right slit were made narrower.
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