In Figure two isotropic point sources S1 and S2 emit light in phase at wavelength 1 and at the same amplitude. The sources are separated by distance d = 6.00? on an x axis. A viewing screen is at distance D = 20.0? from S2 and parallel to the y axis. The figure shows two rays reaching point P on the screen, at height yp.(a) At what value of y p do the rays have the minimum possible phase difference?(b) What multiple of ? gives that minimum phase difference?(c) At what value of yp do the rays have the maximum possible phase difference? What multiple of ? gives?(d) That maximum phase difference and(e) The phase difference when yp = d?(f) When yp = d, is the resulting intensity at point P maximum, minimum, intermediate but closer to maximum, or intermediate but closer to minimum?

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