Waves and the universe

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How do you work out wave speed?
frequency multiplied by wavelength
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How do you work out wavelength?
Speed X frequency
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what is diffraction?
The spreading of waves when they pass through a gap or past an object
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Complete this: The narrower the gap, the ____
more the waves spread out
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Complete this: The wider the gap, the ____
less the waves spread out
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A musical note with a high frequency sounds ______ than one with a low frequency
higher
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A noise of a small amplitude sounds _____ than one with a large amplitude
quieter
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Electromagnetic waves move ____ from one place to another
particles
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Infra red can:
damage skin cells and cause burns
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Visible light can:
Cause blindness
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Ultra Violet can:
Harm the eyes and skin
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Gamma rays can:
Cause cancer
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Micro-waves can:
Cause internal tissue heating
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Which waveband carries more information?
HF
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Which waveband has the shorter range?
UHF
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The atmosphere ____ radio waves that carry signals from local radio stations. This is why the signals cannot be received far away from the transmitter
absorbs
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What is the blue shift?
it happens when an object moves closer to you
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What is the red shift?
It happens when an object moves away from you
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What direction is the blue shift?
Left
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What direction is the red shift?
Right
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What is the big bang theory?
The theory that the universe is expanding after an explosion form an initial point
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What is the steady state theory?
Theory that matter leaked into the universe
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How does the red shitf support the theory of the Big Bang?
Shows us the universe is moving away (so it's expanding)
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Other cards in this set

Card 2

Front

How do you work out wavelength?

Back

Speed X frequency

Card 3

Front

what is diffraction?

Back

Preview of the front of card 3

Card 4

Front

Complete this: The narrower the gap, the ____

Back

Preview of the front of card 4

Card 5

Front

Complete this: The wider the gap, the ____

Back

Preview of the front of card 5
View more cards

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