A certain radio wave has a frequency of 2.0x10^6 Hz. what is its wavelength?

The wavelength of any wave is

(wave speed) divided by (frequency).

For electromagnetic waves, including radio, the

wave speed is close to 3 x 10⁸ m/s (the 'speed of light).

Wavelength = (3 x 10⁸ m/sec) / (2 x 10⁶ / sec)

= 150 meters.