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Waves.

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Presentation on theme: "Waves."— Presentation transcript:

1 waves

2 Waves Wave – a periodic disturbance in a solid, liquid, or gas as energy is transmitted. Waves transfer energy! A wave does not carry matter . It only moves matter as it travels through it.

3 Waves Compression (longitudinal) waves are waves in which the particles of the medium move in a direction parallel to the direction the waves move. Medium – the substance or material that carries the wave

4 Waves Transverse waves are waves in which particles of the medium move in a direction perpendicular to the direction the waves move.

5 Waves Surface waves are waves in which the particles of the medium go through circular motions. Water waves on the ocean’s surface

6 Parts of Longitudinal Waves
Compression - When the particles of a longitudinal wave are close together. Rarefaction - When the particles of a longitudinal wave are far apart.

7 Waves Wavelength – Distance between one point on a wave and the exact same place on the next wave. (measure in m) Period – the time it takes two crests or compressions to pass a fixed point

8 Parts of Transverse Waves
Crest - The highest point of a transverse wave. Trough - The lowest point of a transverse wave. Amplitude – How far the medium moves from rest (equilibrium).

9 Types of Waves Electromagnetic waves can transmit energy through a vacuum. Vacuum – empty space (no air or other medium) Example – Waves from the sun travel through Outer space

10 Types of Waves Mechanical waves can NOT transmit energy through a vacuum. They must have a medium to transport the waves Examples – Sound waves travel through air Water waves

11 Sonic Boom!

12 Wave Velocity f λ

13 Relationships

14 Changing Wave Direction

15 Refraction Refraction is when a wave bends (such as when the medium it is traveling through changes)

16 Diffraction Diffraction is when a wave bends around an object (such as when the medium it is traveling through runs into a barrier)

17 Reflection Reflection is when a wave bounces off of a surface (such as a mirror or an echo)

18 Interference Interference is when a wave bounces off of a surface (such as a mirror or an echo)

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