electromagnetic spectrum

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what is the electromagnetic spectrum ?
he electromagnetic spectrum is a family of (transverse waves that all travel the same speed in a vacuum.
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what has the highest frequency in the electromagnetic spectrum ?
gamma
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what has the smallest frequency in the electromagnetic spectrum ?
radio
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what has the longest wavelength in the electromagnetic spectrum ?
radio
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what has the shortest wavelength in the electromagnetic spectrum ?
gamma
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talk about gamma rays
gamma rays have very high energy and can ionise (kill or damage) cancer cells, but they are also used to image the body .
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talk about x-rays
x-rays are also ionising, and also used in medical imaging.
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talk about ultraviolet
ultraviolet light can ionised skin cells causing sun-burn.
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talk about infrared
infrared radiation is used for heating and communicating, such as in remote controls and optic fibres
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talk about microwaves
microwaves are used for heating and communicating, particularly as mobile phone signals. however they may cause some health risks associated with microwaves used to transmit mobile phones signals, like the long-term exposures to microwaves of kids.
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talk about radio waves
radio waves are used for communication over longer distances, for example transmitting TV and radio programmes
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Other cards in this set

Card 2

Front

what has the highest frequency in the electromagnetic spectrum ?

Back

gamma

Card 3

Front

what has the smallest frequency in the electromagnetic spectrum ?

Back

Preview of the front of card 3

Card 4

Front

what has the longest wavelength in the electromagnetic spectrum ?

Back

Preview of the front of card 4

Card 5

Front

what has the shortest wavelength in the electromagnetic spectrum ?

Back

Preview of the front of card 5
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