The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y.

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what is the wavelength for radio waves with frequency 3 × 109?

Given: The wavelength of radio wave is x and frequency is y.

Here, frequency (y) = 3.0×10⁹ Hz

And the velocity of the radio wave which is equal to the velocity of light (v) =  3.0×10⁸ m/s

Since, wavelength and frequency is inversely proportional to each other then

        x ∝ (1/y)

or,      x = v /y  (1)

Here, v is the proportionality constant.

Now, we shall substitute the given values of y and v in equation (1),

                               x =   (3.0×10⁸ m/s) ÷ (3.0×10⁹ Hz)

or,                            x =  0.1 m

Hence, the required wavelength of the radio wave will be 0.1 m.

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.

my best guesses would have to be either 4.5 or 2. p.s. if they're wrong, i'm so sorry for giving you the wrong answer.