P5 Wave Basics OCR Gateway (9-1)

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  • Created by: Aleena
  • Created on: 31-03-18 10:42
Waves transfer what?
Waves transfer energy from one place to another, without transferring any matter.
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In what direction do waves transfer the energy?
Waves transfer energy in the direction they're travelling
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What happens to the particles of a medium that a wave travels through?
When waves travel through a medium, the particles of the medium vibrate & transfer energy between each other.
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Do the particles move place/position?
No, only the energy is transferred
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Give an example of this in terms of ripples.
If you drop a twig into a calm pool of water, ripples form on the water's surface. The ripples don't carry the water/twig away though.
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Give another example of this in terms of a guitar.
If you strum a guitar string & create sound waves, the sound waves don't carry the air away from the guitar & create a vacuum
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What is the amplitude of a wave?
The displacement of a wave from the rest position to a crest/trough
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What is the wavelength?
The length of a full cycle of the wave, e.g. from crest to crest(or compression to compression)
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What is the frequency of a wave?
The number of complete waves/cycles passing a certain point per second.
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What is Frequency measured in?
Hertz (Hz)
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What is 1 Hz equivalent to?
1Hz=1 wave/second
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What are the other units wave frequencies are measured in?
kHz (kilohertz) or MHz (megahertz). 1 kHz=1000 Hz 1 MHz= 1000000 Hz
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What is the period of a wave?
The number of seconds it takes for one full cycle.
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What is the formula to calculate the period of a wave?
Period= 1/Frequency
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What are transverse waves?
Waves where the vibrations/oscillations are perpendicular to the direction the wave travels.
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Give examples of transverse waves
All EM waves,S waves and Ripples and Waves in the water
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What are Longitudinal waves?
Waves where the vibrations are parallel to the direction the wave travels
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Gives some examples of longitudinal waves
Sound Waves & P Waves
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What are the physical characteristics of longitudinal waves?
They squash up and stretch out the arrangement of particles in the medium they pass through, making compressions (high pressure,lots of particles) & rarefactions(low pressure, fewer particles)
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What is the wave speed equation?
Wave speed (m/s) = Frequency (Hz) x Wavelength (m)
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Other cards in this set

Card 2

Front

In what direction do waves transfer the energy?

Back

Waves transfer energy in the direction they're travelling

Card 3

Front

What happens to the particles of a medium that a wave travels through?

Back

Preview of the front of card 3

Card 4

Front

Do the particles move place/position?

Back

Preview of the front of card 4

Card 5

Front

Give an example of this in terms of ripples.

Back

Preview of the front of card 5
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