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the sound waves reflect back
When a sound hits a flat surface it bounces back in exactly the same direction as before, in exactly the same frequency and pitch.
Diffraction occurs when waves bend around the edge of a barrier.
Sound travels the best through a solid. Since the molecules in a solid are closer together than in a gas or liquid the sound waves don't have to travel as far to reach the next molecule.
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.
the sound waves reflect back
they speed up
When a sound hits a flat surface it bounces back in exactly the same direction as before, in exactly the same frequency and pitch.
The fast is primary wave which travels through liguid, solid and gas. This how Geologist know the outer core is liquid. Secondary waves travel through only solid. The primary wave are the first to reach the seismograph.
Diffraction occurs when waves bend around the edge of a barrier.
five fat things
diffraction
solid. think of it this way you get a large line of people close together to represent solid and you send a shove through them it will reach the end fastest.
Waves rebounding from a barrier is an example of reflection (the physics term) or an echo. If you'd care to investigate further, there is a link below.
A barrier that breaks the force of incoming waves is called a breakwater. It is also called a sea wall. Some piers and wharves are also devices that break the force of incoming waves.BREAKWATER is the barrier that breaks the force of incoming waves.
reflection
Refraction.