Question

Write are the types of diffraction

Answer 1

We can define two distinct types of diffraction: (a) Fresnel diffraction is produced when light from a point source meets an obstacle, the waves are spherical and the pattern observed is a fringed image of the object. (b) Fraunhofer diffraction occurs with plane wave-fronts with the object effectively at infinity.

Answer 2

We can define two distinct types of diffraction:

(a) Fresnel diffraction is produced when light from a point source meets an obstacle, the waves are spherical and the pattern observed is a fringed image of the object.

(b) Fraunhofer diffraction occurs with plane wave-fronts with the object effectively at infinity.