Question

- In Fraunhofer diffraction pattern for single slit, a central maximum is obtained when angle of diffraction
q is equal to zero. What it actually indicates?
(A) All the diffracted rays are parallel and focused by slit at a single point on screen
(B) All the diffracted rays are perpendicular and focused by slit at a single point onscreen
(C) The rays are diffracted by the slit in all the directions
(D) The rays are reflected by the slit
The condition for minima in Fraunhofer diffraction for single slit is asin0 = m.What is ‘0°?
A) Angle of incidence of incident more at the slit​

Answer 1

Answer:

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 (in the far-field region), 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.

The equation was named in honor of Joseph von Fraunhofer[3] although he was not actually involved in the development of the theory.[citation needed]

This article explains where the Fraunhofer equation can be applied, and shows the form of the Fraunhofer diffraction pattern for various apertures. A detailed mathematical treatment of Fraunhofer diffraction is given in Fraunhofer diffraction equation.