Suppose the separation of the narrow slits in Young's Experiment is 1.000 mm and the viewing screen is 5.000 m away. Plane waves of monochromatic 589.3-nm light illuminate the slits and the whole setup is in air where n = 1.00029. What would happen to the fringe separation if all the air was pumped out?

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Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.