In a double slit experiment the distance between the slits is 5.0mm and the slits are the 1.0m from the viewing screen. Two interference patterns can be seen on the screen one due to light with wavelength 480nm and the other due to light with wavelength 600nm. What is the separation on the screen between first order interference fringes of the two different patterns

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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.