Plane waves through a narrow gap emerge as circular waves. This phenomenon is known as
A
interference
B
dispersion
C
refraction
D
diffraction
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Diffraction refers to the various things that occur when a wave encounters an obstacle. This bending of the wave after it passes a small gap is an example of diffraction.
Source: Myschool Past Questions Archive (Record #50015)