Question

What is the wavelength of an FM radio wave of frequency 90Mhz?

Answer 1

Answer:

3.3m

Explanation:

Given parameters:

Frequency  = 90Mhz

Unknown:

Wavelength  = ?

Solution:

To find the wavelength, use the expression below;

  V  = f x wavelength

V is the speed of light = 3 x 10⁸m/s

f is the frequency

Now;

 Insert the parameters

     3 x 10⁸  = 90 x 10⁶ x wavelength

   Wavelength = $\frac{3 x 10^{8} }{9 x 10^{7} }$   = 3.3m