30.) In a Young’s two-slit experiment, the slit separation is 0.20 mm and a screen is 0.40 m from the two-slit. A light source that emits red light of wavelength 700 nm is used. What is the location of the second-order bright fringe?  5.6 mm   2.8 mm   1.4 mm   4.2 mm

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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.