1. Each of the diagrams below shows all of the nodal lines (dashed) and all the lines of maximum constructive interference (solid) due to two point sources. The wavelength, 4, is the same in both cases but the source separation is different. The sources, which are not shown, lie along a horizontal line. Ignore the shading- a. Label every nodal line and line of maximum constructive interference with the appropriate value of AD (in terms of A). b. For each case, determine the source separation (in terms of A). Explain how you determined the source separations. Case X Homework #8: Wave Optics Name: 2. A single change is made to a double-slit apparatus resulting in a new pattern on a screen as shown in the figure below. a. Label each fringe with the appropriate AD (in terms of A) for the original and new pattern on the figure. Original pattern on screen New pattern on screen Center of screen b. For cach of the following quantities, determine whether a change in that quantity could produce the new pattern shown. PLEASE USE THE SAME NOTATION AS THE WORKBOOK. If so: Should the quantity be increased or decreased? Explain your reasoning. If not: Explain why not. the distance between the slits the wavelength of the laser light the distance from the mask to the screen