What is the frequency of radio waves with wavelength of 20m? given: wavelength=20mspeed of light (c) =3×10^8somebody ! i don't know what's the formula

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.