In the Fraunhofer diffraction pattern due to a single slit, the intensity of the central spot is maximum. Explain on the basis of geometrical considerations.

In the Fraunhofer diffraction pattern due to a single slit, the intensity of the central spot being maximum can be explained based on geometrical considerations and the interference of waves.

When a monochromatic light wave passes through a narrow slit, diffraction occurs, leading to the spreading of the wavefront. The resulting diffraction pattern is observed on a screen placed at a distance from the slit. The central maximum, also known as the central __________ ____ _________ __________ _______ __________.
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