Electromagnetic waves

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  • Created by: Sam Evans
  • Created on: 23-05-14 20:44
Which part of the electromagnetic spectrum has the longest wavelengths?
Radio waves
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Which part og the electromagnetic spectrum is between X-rays and visible light?
Ultraviolet
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Which part of the electromagnetic spectrum transfers the least energy?
Radio waves
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Which part of the electromagnetic spectrum is used to transmit signals to and from satellites?
Micro waves
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How does visible light travel along an optical fibre?
By total internal reflection
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What is the Doppler effect?
The apparent change in wavelength and frequency of waves from a moving source
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What is a galaxy?
A very large collection of stars
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What has happened to the frequency of light that reaches Earth from distant galaxies?
It has been shifted towards the red end of the spectrum
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How can we tell if light from a distant galaxy has been red-shifted?
By observing the position of dark lines in the spectrum from the galaxy
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What has happened to the gamma radiation produced at the time of the Big Bang?
It has become stretched out to microwave radiation
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What piece of evidence can only be explained by the Big Bang theory?
The existence o cosmic cosmic microwave background radiation
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Other cards in this set

Card 2

Front

Which part og the electromagnetic spectrum is between X-rays and visible light?

Back

Ultraviolet

Card 3

Front

Which part of the electromagnetic spectrum transfers the least energy?

Back

Preview of the front of card 3

Card 4

Front

Which part of the electromagnetic spectrum is used to transmit signals to and from satellites?

Back

Preview of the front of card 4

Card 5

Front

How does visible light travel along an optical fibre?

Back

Preview of the front of card 5
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