Draw an experimental setup in the Laboratory in which you are working, where only the diffraction phenomenon is observed . Explain why you use each element you use in the setup.
Experimental setup:
Fresnel
diffraction
If either source or screen or both are at finite distance from the
diffracting device (obstacle or aperture), the
diffraction is called fresnel diffraction and the pattern is the
shadow of the diffracting device modified by diffraction
effect. Diffraction at a straight edge, small opaque disc, narrow
wire are examples of fresnel diffraction.
Elements used:
Source (S) : it is used to generate wavefront of light
Slit: It is used to diffract the light wave from the edges of the slits.
Screen: Screen is used to observe the fringe pattern of light after the diffraction.
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