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30 December, 17:40

What are the wavelength ranges for the following? (a) the AM radio band (540-1600 kHz) maximum wavelength m minimum wavelength m (b) the the FM radio band (88-108 MHz) maximum wavelength m minimum wavelength m

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  1. 30 December, 21:15
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    a) AM radio band (540-1600 kHz)

    frequency = 540 kHz = 540 x 10³ Hz

    wave length = velocity of light / frequency

    = 3 x 10⁸ / 540 x 10³

    = 555.55 m

    frequency = 1600 kHz = 1600 x 10³ Hz

    wave length = velocity of light / frequency

    = 3 x 10⁸ / 1600 x 10³

    = 187.5 m

    maximum wavelength = 555.55 m

    minimum wavelength = 187.5 m

    b)

    AM radio band (88 - 108 MHz)

    frequency = 88 MHz = 88 x 10⁶ Hz

    wave length = velocity of light / frequency

    = 3 x 10⁸ / 88 x 10⁶

    = 3.41 m

    frequency = 108 MHz = 108 x 10⁶ Hz

    wave length = velocity of light / frequency

    = 3 x 10⁸ / 108 x 10⁶

    = 2.78 m

    maximum wavelength = 3.41 m

    minimum wavelength = 2.78 m
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