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3 March, 05:43

If the number on an FM radio dial reads 99.5 MHz, what is the wavelength of this signal?

a.

2.23 m

c.

3.02 m

b.

3.23 m

d.

2.03 m

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Answers (1)
  1. 3 March, 05:50
    0
    1 MHz - - - 1 000 000 Hz

    99.5 MHz - - - x

    x = 99 500 000 Hz = 99,5x10^6 Hz

    v = λ. f

    c = λ. f

    3x10^8 = λ. 99,5x10^6

    λ = 3x10^8 / 99,5x10^6

    λ ≈ 0,0302x10^2

    λ ≈ 3,02 m

    i think is the letter (B), isn't it?
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