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CECS 5400.020/026
Blair Copeland
Educational Telecommunications

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LTEC 3530.020/026
Blair Copeland
Data Communications

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•  calculations.html

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This course is offered by the Department of Learning Technologies in the College of Information at UNT. Undergraduate and Graduate degrees are available. For more information call 1-877-275-7547.

Calculating Radio Frequencies

Discussion of this information audio mp3

Frequency Chart

The following figure shows the Electromagnetic spectrum.

Calculating the Frequency of Wavelengths

Wavelength: The distance between successive crest or trough in a wave.

Frequency: The number of complete waves passing a point in a given amount of time. s^-1 or 1 per second or 1/s and is called a hertz. The following figure is an illustration of wavelength and frequency.

Amplitude: The maximum height of a wave, as measured from the axis of propagation.

Nodes: Points of zero amplitude.

Calculating Wave Length

Wavelength (m) X Frequency (s^-1) = velocity (m/s)

C = 2.99792458 X 10⁸ m/s ^-1

Example Question

The frequency of the radiation used in all microwave ovens sold in the US is 2.45 GHz. (10⁹ s^-1) What is the wavelength (in meters) of this radiation?

ANSWER:

2.998 x 10⁸ ms^-1 / 2.45 X 10⁹ s^-1 = .122 m

Note: The s-1 cancel each other out