WAUS operates at a frequency of 90.7 MHz. These waves travel at 2.99 × 10^8 m/s. What is the wavelength and period of these radio waves?

Answer 1

There are a few things you need to know to answer this question:

1. 1,000,000 Hz = 1 MHz
2. Period = 1/Frequency
3. Wavelength = c/Frequency, where c is the speed of light (2.99x10⁸ m/s)

So we can easily compute the Period (after converting MHz to Hz) like this:

1. 90.7 MHz = 90700000 Hz = 9.07x10⁷ Hz, this is the Frequency
2. Period = 1/Frequency = 1/9.07x10⁷ = 1.10x10^-8 seconds

Now for the wavelength:

1. Wavelength = c/Frequency
2. Wavelength = 2.99x10⁸ / 9.07x10⁷ = 3.297 meters

Best of luck to you, hope this was helpful.

David