Some waves travel backward because of a phenomenon called wave reflection. When a wave encounters a boundary or obstacle, it can reflect off of it and travel in the opposite direction.
A backward travelling wave differs from a forward travelling wave in the direction of its movement. A forward travelling wave moves in the direction of its propagation, while a backward travelling wave moves in the opposite direction.
Some examples of backward travelling waves include reflected waves in a string, sound waves in a closed room, and electromagnetic waves in a metal surface.
Yes, it is possible for a backward travelling wave to reverse its direction of travel. This can occur if the wave encounters a boundary or obstacle that causes it to reflect and travel in the opposite direction.
The concept of backward travelling waves is important in physics because it helps us understand the behavior of waves when they encounter boundaries or obstacles. It also has practical applications in fields such as acoustics, optics, and electronics.