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13 Cards in this Set
- Front
- Back
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Explain how elecrtromagnetic waves are a natural outcome of the principles of ecectromagnetism.
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1
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List the main types of electromagnetic waves in order of increasing frequency. Give at leave one usefull application for each type of wave.
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1
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Alternating Current with a frequency of 1 million Hz flows in a wire. What in particular could be detected traveling outward from the wire?
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1
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What are the main uses of microwaves? Explain how each process works.
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1
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Which type of EM wave does your body emit most strongly?
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1
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What is differet about our perceptions of the different frequencies within the visible light band of the EM spectrum?
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1
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How are x rays produced?
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1
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Why are x rays m ore strongly absorbed by bones than by muscles and other tissues?
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1
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What is blackbody radiation? How does the radiation emitted by a blackbody change as its temperature increases?
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1
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What is different about a start that appears reddish compared to one that appears bluish?
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1
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What effect does the ozone layer have on the EM waves from the Sun? What is currently threatening the ozone layer?
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1
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Describe the greenhoouse effect that is occuring in the Earth's atmosphere.
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1
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How does the inosphere affect the range of radio communications?
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1
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