Monochromatic light with a wavelength of 6.4 E−7 meter passes through two narrow slits, producing an interference pattern on a screen 4.0 meters away. The first order bright band lines is 2.0 E−2 meters away from the central bright maxima. What is the distance between the slits?  a 1.3 E−4 m  b 8.0 E−6 m  c 3.2 E−9 m  d 7.8 E3 m

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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.