Why Can Waves Change Direction at Breaking News

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Why Can Waves Change Direction, The vibration caused by p waves is a volume change, alternating from compression to expansion in the direction that the wave is traveling. The direction of the wind is related to the orientation of the isobars and friction. Why do light waves change direction?

GCSE Physics Waves in a ripple tanks YouTube
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If the wave is entering the medium at an angle, then part of the wavecrest enters the medium first, and starts to slow down, while the other part of the wavecrest is still going fast, and therefore the wavecrest must bend. When a wave encounters a surface object, the object appears to lurch forward and upward with the wave, but then falls down and back in an orbital rotation as the wave continues by, ending up in the same position as before the wave came by. This is why the wavefront changes direction.

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The waves are refracted as they travel through the earth due to a change in density of the medium. If a wave of light is reflected by an opaque material, it changes direction. It is the slowest of the three types of seismic wave. S waves cannot pass through the liquid outer core, but p waves can. If the wave is entering the medium at an angle, then part of the wavecrest enters the medium first, and starts to slow down, while the other part of the wavecrest is still going fast, and therefore the wavecrest must bend.