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20 Cards in this Set
- Front
- Back
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Wave Speed =
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Frequency x Wavelength
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unit of Frequency
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Hertz
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The distance from one crest
to another |
wavelength
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speed of a wave with a wavelength
of 4cm and a frequency of 10kHz |
400 metres per second
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Wavelength of a wave with a speed of 10
metres per second and a frequency of 20 hz |
0.5 metres
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A sound wave is which type of wave?
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longditudinal
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the distance between the top of
a crest and the centre line |
amplitude
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When light bends on entering a different medium
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Refraction
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Light refracts when entering a new medium because it
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The speed of the wave changes
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The angle at which total internal reflection
occurs |
The critical angle
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High Speed communications technology
that uses total internal reflection |
Fibre Optics
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Digital Signals
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Have only two values, on and off
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A signal with a continuously varying value
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analogue
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Digital signals suffer from less interference
because |
the noise is not amplified with the signal
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The process of sending many digital signals
at the same time |
Multiplexing
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The digital information on a CD is read with
a |
Laser
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Lasers are used because the light is
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coherent and in phase
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The digital code on a CD is stored as a series of
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bumps and pits
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Earthquake waves come in 2 types
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S and P waves
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Properties of an s wave
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Slow, transverse, travel through solids and liquids
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