Concept:Diffraction is the spreading or bending of a wave as it passes around the edge of an obstacle or through a narrow opening.
Explanation:A wave does not always travel in a perfectly straight line after meeting a barrier.
When it encounters a corner or a small gap, it curves into the area that lies behind the obstacle.
This bending around corners is a natural wave property known as diffraction.
Diffraction is most noticeable when the size of the obstacle or opening is comparable to the wavelength of the wave.
Polarisation refers to the orientation of vibrations in a transverse wave.
Dispersion is the separation of a wave into its different frequency components.
Reflection is the bouncing back of a wave from a surface.
None of these describe the ability to spread around corners.
Answer:C. diffraction