![]() ![]() Consequently, not all 15 fringes may be observable. We also note that the fringes get fainter farther away from the center. Therefore, if the slit separation and the sizes of the slits become much greater than the wavelength, the intensity pattern of light on the screen changes, so there are simply two bright lines cast by the slits, as expected, when light behaves like rays. ![]() However, recall (see The Propagation of Light) that wave interference is only prominent when the wave interacts with objects that are not large compared to the wavelength. Bragg’s law explains how the angle of a diffracted X-ray beam. The basic law of diffraction was discovered by Lawrence Bragg when he was a student at Cambridge University and he was just 22 years old. When light encounters an edge or an obstacle, such as a sharp edge or a corner, diffraction occurs.The wavelength of light determines the extent of this diffraction.If the wavelength is much larger than the size of the edge or obstacle, the diffraction effects will be minimal. The number of fringes is very large for large slit separations. The diffraction of X-rays is used as the main method for determining the atomic and molecular structures of inorganic and biological materials. The number of fringes depends on the wavelength and slit separation. Light - Electromagnetic, Wavelength, Spectrum: In spite of theoretical and experimental advances in the first half of the 19th century that established the wave properties of light, the nature of light was not yet revealedthe identity of the wave oscillations remained a mystery. Therefore, the largest integer \(m\) can be is 15, or \(m=15\). ![]()
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