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4) A beam of coherent monochromatic light from a distant galaxy is used in an optics experiment on Earth. A. The beam shines on a double slit. The distance between the slits is 0.300 mm. A screen is at a distance D from the slits. The diffraction angle 0 is labelled. screen I | i) The wavelength of the beam as observed on Earth is 633.0 nm. The distance to the screen is 4.50 m. Calculate distance between a dark and a bright fringe on the screen. [2] ii} Each slit has a width of 6.5 pm. Calculate the separation distance of the single slit minima on either side of the central maximum. [2] B. Draw an intensity vs distance graph for the interference pattern above. Make sure it includes the central maximum and at least 2 other visible maxima. [3]