To calculate the wavelength of a radio wave with a frequency of 3x10^11 Hz, you can use the formula:
Wavelength (λ) = Speed of Light (c) / Frequency (f)
The speed of light in a vacuum is approximately 3x10^8 meters per second (m/s).
Substituting the values into the formula:
λ = (3x10^8 m/s) / (3x10^11 Hz)
Performing the division:
λ = 1x10^(-3) meters
Therefore, the wavelength of a radio wave with a frequency of 3x10^11 Hz is 1 millimeter (mm).