Physics P6

Physics P6

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Physics P6
Sound is a longitudinal wave.
Light is a transverse wave.
A wave is a disturbance moving through a medium. Parts of the medium move to and
from as the wave passes, but the medium does not move as a while in the direction if
the wave.
A wave carries energy and information through the medium.
Wave Characteristics:
The amplitude of a wave is the maximum disturbance of each particle of the medium as
the wave passes.
The frequency is the number of waves produced every second by the source (which is
also the number of waves passing any point in the medium every second).
The wave speed is the speed at which each wave crest moves through the medium.
Amplitude and frequency depend on the source; wave speed depends on the medium.
The wavelength is the distance from one wave crest to the next.
For all waves: `wave speed = frequency x (times) wavelength' In any given medium, the
wave speed is fixed. So the bigger the frequency, the smaller the wavelength.

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Wave properties:
Four ways on which all waves behave are: reflection, refraction, diffraction, and
The last two characteristics of waves. They provide evidence that a radiation behaves
like a wave.
Light waves:
Light behaves like a wave, showing diffraction and interference, if you look carefully.
Scientists believe that light consists of vibrating electric and magnetic fields ­ an
electromagnetic wave.
Electromagnetic Spectrum:
The electromagnetic `family' of waves all travel through a vacuum with a wave speed of
300,000 kilometres per second.…read more

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Electromagnetic waves can be used to vary information.…read more


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