Light is a form of energy. How does light move?
If you try to see how light is actually traveling you will find it impossible. Physicists believe it travels in some ways like water, as a wave motion. They think light energy is carried along very tiny ripples, much smaller than water waves.

Imagine a cork on a pond. Waves make the cork bob up an down but it doesn't move in the direction the wave is going. Light waves vibrate similarly, up and down and also from side to side, while the light energy moves forward. This is the characteristic of Transverse wave.

Transverse Wave

A Transverse Wave is a wave in which particles of the medium move in a direction perpendicular to the direction which the wave moves. The animation below shows a one-dimensional transverse plane wave propagating from left to right. The particles do not move along with the wave; they simply oscillate up and down about their individual equilibrium positions as the wave passes by. Pick a single particle and watch its motion.

Transverse waves include all electromagnetic (radiowave, microwave, Infra Red, visible light, ultra violet., X-rays and Gamma rays)

Click here to see more animation on Transverse wave. Checkout this Applet too.