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Yes, waves do speed up as they approach the shore because the energy of the wave is compressed into a smaller area. This causes the wavelength to decrease, leading to an increase in wave speed.
Destructive interference causes the crest of a wave to decrease or cancel out. This occurs when the crest of one wave aligns with the trough of another wave, resulting in a reduction or cancellation of the overall amplitude.
As a wave approaches the shore, its height increases and its speed decreases. This causes the wave's energy to be concentrated, leading to the wave breaking as it reaches shallow water near the shore. The breaking of the wave causes it to release its energy, creating the crashing sound associated with waves hitting the shore.
Reflected
Ultraviolet radiation does that.