Question

Center of diffraction pattern in fraunhofer diffraction

Answer 1

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★ For example, when a slit of width 0.5 mm is illuminated by light of wavelength 0.6 μm, and viewed at a distance of 1000 mm, the width of the central band in the diffraction pattern is 2.4 mm. The fringes extend to infinity in the y direction since the slit and illumination also extend to infinity.

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Answer 2

Answer:

Explanation:

In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance from the diffracting object, and also when it is viewed at the focal plane of an imaging lens.[1][2] In contrast, the diffraction pattern created near the object, in the near field region, is given by the Fresnel diffraction equation.