Question

When a wave strikes a solid barrier it behaves like a basketball hitting a backboard this wave behavior years called?

Answer 1

The answer is Reflection

Answer 2

This property of a wave is reflection. 
Reflection of a wave is the process by which waves such as light, sound , infrared, or radio waves, hits and object and bounces off it. It is the change in direction of a wave front at an interface between two different media so that the wavelength returns into the medium of origin.  From the law of reflection for a specular reflection the angle at which the wave is incident on the surface is equal to the angle at which it is reflected.