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WAVES

WAVES. What is a wave?. Any disturbance that transmits energy through matter or space. What is a medium?. A substance through which a wave can travel. A medium can be a solid, liquid, or gas. Sound waves and ocean waves require a medium (these are mechanical waves).

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WAVES

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  1. WAVES

  2. What is a wave? • Any disturbance that transmits energy through matter or space.

  3. What is a medium? • A substance through which a wave can travel. A medium can be a solid, liquid, or gas. • Sound waves and ocean waves require a medium (these are mechanical waves)

  4. Waves that don’t need a medium • Visible light, microwaves, tv and radio waves are electromagnetic waves. They CAN travel through substances but move faster through empty space.

  5. crest trough Types of Waves • Transverse waves: particles move perpendicular to the direction the wave is traveling. (ex. Electromagnetic waves)

  6. rarefactions compressions • Longitudinal waves: the particles move back and forth along the path the wave travels. (sound waves)

  7. Combination of Waves • Surface waves are a combination of transverse and longitudinal.

  8. Properties of Waves

  9. Amplitude • The maximum distance the wave vibrates from its rest position. (large amplitude= more energy)

  10. Amplitude of Sound • Loudness of sound is related to amplitude.

  11. Wavelength • The distance between any two adjacent crests or compressions in a series of waves.

  12. Frequency • The number of waves produced in a certain amount of time. (the higher the frequency, the shorter the wavelength) • Higher frequency means more energy • Frequency is measured in Hertz (Hz) waves per second.

  13. Frequency of Sound • Frequency of sound is called pitch. This determines how high or low a sound is.

  14. Wave Interactions

  15. Reflection • When a wave bounces back after striking a barrier. • Reflected sound waves are called echoes.

  16. Refraction • The bending of light waves as they pass at an angle into a new medium.

  17. Diffraction • The bending of waves around a barrier or through an opening.

  18. Interference • Two or more waves overlapping.

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