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Waves (Refraction (Waves changing direction at a boundary, Difference in…
Waves
Refraction
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Difference in distance travelled, by wavefront causes wave to bend
When a wave crosses a boundary between materials, it changes speed
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If it hits boundary at an angle, change of speed causes change in direction
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Greater change in speed, makes a wave bend
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Waves at boundaries
Wave is REFLECTED, this is where the ray is neither absorbed or transmitted, it is sent back. away from second material
Waves are either ABSORBED, TRANSMITTED & REFLECTED at boundaries
Waves is TRANSMITTED through the second material, wave carries on travelling through new material. Often leads to refraction. Used in communications
Waves is ABSORBED by the second material, the wave transfers energy to materials energy stores. Energy is transferred to a thermal energy store
Longitudinal waves
Creates compressions (high pressure, lots of particles) and rarefactions (low pressure, fewer particles)
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Transverse waves
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EM waves, S-Waves and ripples are all transverse waves
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