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Wave properties of light The graph of intensity versus 9 at right corresponds to a doubleslit 1' experiment similar to the one described in problem 1. In each part below, suppose that a single change were made to the original apparatus. In the spaces provided. show how the graph of intensity versus 6 would be different from the original graph (shown dashed). In each case. explain your reasoning. ' the distance between the centers of the slits is increased (without I changing the width of the slits) - the wavelength of the incident light is increased - the distance from the mask to the screen is decreased - the width of both slits is decreased by the same amount (without I changing the distance between the centers of the slits) WAVE PROPERTIES OF LIGHT Name l. A distant point source of red light. a mask with two identical. very narrow slits, and a screen are arranged as shown in the top-view diagram below right. The diagram at right shows the pattern that appears on a distant screen. Point P, the center of the pattern, and point Q are maxima. Point R marks a minimum to the right of point Q. a. In the space above the diagram at right. clearly label each of the lettered points according to AD. the difference in distances from the slits to that point. Express each value of AD in terms of A. Center of screen b. The screen is 2.2 m from the slits, and the distance from Tap New ("at '0 scale) point P to point It is 1.6 mm. p l Determine the distance between the slits in terms of A. Show : Screen your work and describe any approximations that you make in I answering this question. 1 Mask with 2 slits To distant 1 point source c. 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 0 point R ii. The graph of intensity (1} versus 8 shown at right corresponds to the above double-slit experiment. (The angle 6 is measured relative to the normal to the screen.) 0n the graph at right, show how the intensity graph would be different if the right slit were made narrower