Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not...

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Waves

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Common Characteristics of All Waves

Transcript of Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not...

Page 1: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Waves

Page 2: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Definitions• Wave: a disturbance that transfers

energy through a medium. The matter does not experience net movement, but vibrates about some rest position.

• Mechanical Wave: waves that travel through matter.

Page 3: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Common Characteristics of All Waves

Page 4: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Common Characteristics of All Waves

• Crests: the highest points• Troughs: the lowest points• Amplitude: the distance between the rest

position and a crest or trough

Page 5: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Common Characteristics of All Waves

• Wavelength (λ, lambda): the shortest distance between two points in the medium that are in phase

• Frequency (f): the number of complete wavelengths that pass a point in a given time. (Unit: Hertz, Hz)

• Period (T): the time it takes for one full wavelength to pass a given point.

Page 6: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Types

• Transverse Wave: the particles of the medium vibrate at right angles to the direction of motion (example: water waves)

• Longitudinal Waves: the particles of the medium vibrate parallel to the direction of the motion (example: sound waves)

Page 7: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Universal Wave Equation

• P347 Model Problem

Page 8: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Universal Wave Equation

• The form of the equation v=∆d/Δt for waves

• The speed of a wave is the product of the wavelength and the frequency

v= fλ

Page 9: Waves. Definitions Wave: a disturbance that transfers energy through a medium. The matter does not experience net movement, but vibrates about some rest.

Practice Problems

• P 350 #5-9


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