In the double-slit experiment, the viewing screen is at distance D= 4.00 m, point P lies at distance y = 20.5 cm from the center of the pattern, the slit separation d is 4.50 mm, and the wavelength l is 580 nm. (a) Determine where point P is in the interference pattern by giving the maximum or minimum on which it lies, or the maximum and minimum between which it lies. (b) What is the ratio of the intensity IP at point P to the intensity Icen at the center of the pattern?

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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.