Find the true statement. use the underlined word to determine whether the statement is true or false. question 3 options: electromagnetic waves are mechanical because they require a medium to travel. electromagnetic waves are transverse because they have electric and magnetic fields that move perpendicular to the direction of energy transfer. the speed of an electromagnetic wave depends on the frequency of the wave. gamma rays are faster than radio waves. as the frequency of an em wave increases, so does the wavelength. they are directly related.