A technician is performing Young's double-slit experiment for her supervisor. She directs a beam of monochromatic light to a pair of parallel slits, which are separated by 0.102 mm from each other. The portion of this light that passes through the slits goes on to form an interference pattern upon a screen, which is 4.50 meters distant. The light is characterized by a wavelength of 588 nm. (a) What is the optical path-length difference (in µm) that corresponds to the fourth-order bright fringe on the screen? (This is the fourth fringe, not counting the central bright band, that one encounters moving from the center out to one side.)  µm (b) What path-length difference (in µm) corresponds to the fourth dark fringe that one encounters when moving out to one side of the central bright fringe?  µm

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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.