Physics (waves)

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The law of reflection states the angle of incidence...
...is equal to the angle of reflection.
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The spring needs to be moved before pulses travel along it. Each pulse transfers...
...energy from one end of the spring to the other.
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Transfer waves distribute disturbances at...
...right angles to the direction of energy flow.
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Longitudinal waves distribute disturbances in...
...the same direction as the energy flow.
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Mechanical waves can...
...only pass trough a medium.
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The entry incident ray and exit refraction ray...
...are the same.
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The entry refraction ray and the exit incident ray...
...are the same.
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Electromagnetic waves can...
...pass through a vacuum as well as a medium.
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A beam of light enters a glass. The light slows down...
...as it enters the glass, so the wavefronts bunch up and the wavelength decrease. This makes the beam change direction towards the normal. When the light leaves the block it speed up. so the wavefronts read out and the wavelength increase.
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The ray of a wave...
...shows the direction of flow of the energy.
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The normal is the line...
...at right angles to the surface.
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...out of a wave as it passes through a gap.
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Reflection is the change...
...of direction of a wave as it changes medium.
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The wave front represents...
...the crest of a wave seen from the top.
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Wave length is...
...the separation of wavefronts.
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All electromagnetic radiation travels through space...
...with the same speed. They travel as waves which are longitudinal.
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Speed is the distance...
...moved by a wave peak in one second.
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Frequency is the...
...number of wave peaks emitted by the source per second.
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Amplitude is the...
...maximum value of disturbances.
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Wavelength is the...
...distance between adjacent peaks of the wave.
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To calculate the speed of a wave you do...
...wave speed = frequency x wavelength
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All types of electromagnetic waves...
...travel at the same speed in a vacuum.
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The EM spectrum goes...
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...stop gamma rays escaping into the treatment room.
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Chemicals in sun cream...
...absorb ultraviolet before it reaches the skin.
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The doppler effect is the frequency of a wave due to...
...relative motion between the source of the wave and the observer.
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Redshift means when astronomers look at the absorption spectra....
...from distant galaxies. They find that the black absorption lines are all shifted towards the red end of the spectrum.
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Other cards in this set

Card 2

Front

...energy from one end of the spring to the other.

Back

The spring needs to be moved before pulses travel along it. Each pulse transfers...

Card 3

Front

...right angles to the direction of energy flow.

Card 4

Front

...the same direction as the energy flow.

Card 5

Front

...only pass trough a medium.