What is the wavelength for radio waves with frequency $3 times 10^9$ ?

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Answer 1 · 2017-03-05T13:25:01

$lambda = 0.1m$

The equation for light waves is

$c = flambda$

where $c$ is the speed of light, which is always $3xx10^8ms^-1$ in a vacuum, $f$ is the frequency and $lambda$ is the wavelength.

We want to find the wavelength, so rearrange and put in values we know,

$lambda = c/f = (3xx10^8)/(3xx10^9) = (cancel(3)xx10^8)/(cancel(3)xx10^9) = 10^-1 = 0.1m$

What is the wavelength for radio waves with frequency 3 times 10^93 times 10^9?