Question

Which principle explains the phenomenon of diffraction?

(a) Principle of Simultaneity

(b) Pascal’s Principle

(c) Archimedes’ Principle

(d) Huygen’s principle

This question was addressed to me in an online interview.

Asked question is from Diffraction in portion Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer 1

Right choice is (d) Huygen’s principle

Easy explanation: The phenomenon of diffraction can be explained by Huygen’s principle. It states that all points on a wavefront can be considered as point sources for the production of secondary wavelets. And these wavelets combine to produce a new wavefront in direction of propagation.