Memory Game Waves BreakoutOnline version Review waves vocabulary by Kimberly Scott mechanical wave wave transverse wave electromagnetic wave retina a repeated back and forth or up and down motion R the light sensitive inner surface on the back of the eye, containing light sensitive cells E cornea waves that require a medium through which to travel S repeated disturbance or vibration that transfers or moves energy from place to place T wave in which the vibration is at right angles to the direction in which the wave is traveling V optic nerve medium clear tissue that covers the front of the eye and refracts light the lens E vibration longitudinal wave a wave in which the particles of the medium vibrate parallel to the direction of wave motion N the nerve that carries messages from the retina to the brain for interpretation S a form of energy that can move through the vacuum of space and travels in a transverse wave A material through which a wave travels R