EM Waves Flashcards

1
Q

What are the seven types of electromagnetic waves?

A

Radio waves, Microwaves, Infra red, Visible light, Ultra violet, X-Rays and Gamma rays.

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2
Q

What EM wave has the highest frequency and smallest wavelength?

A

Gamma rays.

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3
Q

How are radio waves used for communication?

A

Short-wave signals reflect off the ionosphere and transmit there signals to satellites (radio and tv) and long-wave signals diffract around the earth.

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4
Q

What are microwaves used for?

A

Satellite communication and mobile phones

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5
Q

How do optical fibres work?

A

They carry data over long distances very quickly. The signal is carried as pulses of light or infra red radiation and is reflected off the sides of a very narrow core from one end of the fibre to the other.

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6
Q

The higher the frequency, the higher the _____.

A

Pitch

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