How are em waves and mechanical waves different? * check all that apply 5 points em waves can travel through a vacuum. all em waves are transverse mechanical waves must have a medium. all mechanical waves are longitudinal. some mechanical waves are longitudinal.

Particles transfer energy physically from one to the other either horizontally in a longitudinal wave, vertically in a transverse wave, or in circles in a surface wave. Waves can also be electromagnetic, which are always transverse and do not require a medium to propagate, like light waves traveling through space.