Predict: How do you think the frequency of a wave with wavelength of 50 m will compare to the frequency of a wave with wavelength 100 m? Predict: How do you think the speed of a wave with wavelength o...Predict: How do you think the frequency of a wave with wavelength of 50 m will compare to the frequency of a wave with wavelength 100 m? Predict: How do you think the speed of a wave with wavelength of 50 m will compare to the speed of a wave with wavelength 100 m? Calculate: Using the equation λ = c / f, what will the frequency be for a wave with a wavelength of 100 m? (A light wave with this wavelength is known as a radio wave.)