anna7
anna7
18-01-2015
Physics
contestada
find the wavelength of radio waves of frequency 200kHz
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naǫ
naǫ
18-01-2015
[tex]\lambda = \frac{c}{f}[/tex]
λ - wavelength, c - the speed of light, f - frequency
[tex]f=200 \ kHz= 200 000 \ Hz \\ \\ \lambda=\frac{300 000 \ [\frac{km}{s}]}{200 000 \ [Hz]}=\frac{3}{2}=1.5 \ [km][/tex]
The wavelength of these waves is 1.5 km.
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AL2006
AL2006
19-01-2015
For any wave, Wavelength = (speed) / (frequency)
For radio waves, Speed = about 3x10⁸ meters per sec ("speed of light")
So Wavelength = (3 x 10⁸ m/s) / (200 x 10³ /sec) =
1,500 meters
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