It is called diffraction.
Diffraction
Three ways that waves change direction are reflection, refraction, and diffraction.
"reflection"
The incident wavefront is the crest of the wave before it hits a barrier which causes it to reflect
To answer your question in just two sentences....Waves can bend around a barrier because each point of a wave is actually traveling in all directions. Whether a wave bends around a barrier or not depends on how all the points of a wave add up together.To really understand this you want to look into Huygens principle at Wikipedia.org, "The World's Encyclopedia"The link is in the "Related Links" section at the bottom of this answer.Here is a quote from it.."It recognizes that each point of an advancing wave front is in fact the center of a fresh disturbance and the source of a new train of waves; and that the advancing wave as a whole may be regarded as the sum of all the secondary waves arising from points in the medium already traversed. This view of wave propagation helps better understand a variety of wave phenomena, such as diffraction."You also want to read up on diffraction which is a link in the above quote.Diffraction is what you want to understand. It involves interference.It really is the most "magical' property of waves.A part from the question being answered above, why isobars are horizontal at the warm front sector and curve at the cold front sector?Chan Chuol Lam
Disturbance in particle motion parallel to the wave velocity is called a longitudinal wave. Disturbance in particle motion perpendicular to the wave velocity is called a transverse wave.
It is called diffraction.
diffraction
diffraction
Diffraction is the bending of a wave at an angle as it passes from one medium to another.
Diffraction is phenomena that occurs when a wave encounters an obstacle. This happens when a wave reaches an obstacle that is comparable in size to it.
Diffraction, more diffraction if wavelength is increased (or frequency decreased)
When a wave bends around an obstacle, it is called diffraction.
I believe you are referring to Refraction.
its called a reflected wave because just like a reflection the wave bounces back of the barrier
Defraction.
diffraction is the answer
diffraction is the answer