Question

The following intensity variation graph is for _____________

(a) Single slit Diffraction

(b) Double slit diffraction

(c) Edge Diffraction

(d) Cornu’s Spiral

This question was posed to me in an interview for job.

The question is from Differences of Fresnel and Fraunhofer Diffraction in chapter Diffraction of Engineering Physics II

Answer 1

Correct choice is (c) Edge Diffraction

The explanation is: The diffraction pattern shown is due to diffraction at a straight edge. It shows that the intensity falls off quickly without any maxima and minima. Fresnel Diffraction takes place in this case.