Reflection can come from an end that is fixed or an end that is free. Reflection is a property common to all waves.
In this ripple tank, we can see the reflected ripples adding to the original ripples and forming patterns.
These water waves are reflecting from a vertical wall in deep water.
Because the wave motion is not being destroyed and the waves aren't breaking, very little energy is lost, so they are reflecting back down the tank. Waves reflect at the same angle and pass easily through each other.
The angle of incidence equals the angle of reflection, in this case 45 degrees. Once again, the waves pass harmlessly through each other.
When waves hit a parabola, they are focused at one point.
Reflection
How are the angle of incidence and the angle of reflection related?
Reflection
What is reflection?
