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Published byAbigail Young Modified over 5 years ago

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WAVES

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MECHANICAL WAVES A disturbance in matter that carries evergy from one place to another Thy require matter to travel through…this is called a medium (solids liquids and gases) A mechanical wave created when a source of energy causes a vibration to travel through a medium Three main types of mechanical waves are transverse waves, longitudinal waves and surface waves.

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MECHANICAL WAVES Two different types: Transverse Longitudinal

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LONGITUDINAL WAVE A wave in which the vibration of the medium is parallel to the direction the wave travels

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TRANSVERSE WAVES A wave that causes a medium to vibrate at right angles to the direction in which the wave travels Everything is at rest before its starts When vibrations start, wave is caused.

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PROPERTIES OF WAVES Periodic Motion: any motion that repeats at regular time intervals Period-a complete motion that returns to its starting point Frequency-complete cycles in a given time A waves frequency equals the frequency of the vibrating source producing the wave

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PROPERTIES OF WAVES Wavelength the distance between a point on one wave and the same point on the next cycle of the wave. Increasing the frequency of a wave decreases its wavelength.

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PROPERTIES OF WAVES Wave speed- equal to the wavelength times the frequency V=λf Where v is the speed f is the frequency λ is the wavelength

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PROPERTIES OF WAVES Amplitude A wave is the maximum displacement of the medium from its rest position The more energy a wave has, the greater is its amplitude

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BEHAVIOR OF WAVES Reflection- occurs when a wave bounces off a surface that it cannot pass through Reflection does not change the speed of frequency of a wave but the wave can be flipped upseide down. Sound- SONAR Radio-RADAR Sufurce- Water

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PROPERTIES OF WAVES Refraction-the neding of a wave as It enters a new medium at an angle Bending of the light in water When a wave enters a medium at an angle refraction occurs because one side of the wave moves more slowly than the other side.

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PROPERTIES OF WAVES Diffraction-bending of a wave around an object or through an opening.

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INTERFERENCE Occurs when two or more waves overlap and combine together Two types of interence: Constructive destrctive interference

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CONSTRUCTIVE INTERFERENCE When two or more wavescombine to produce a wave with larger displacement

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DESTRUCTIVE INTERFERENCE Occurs when two or more waves combine to produce a wave with a smaller displacement

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