HOW DOES LIGHT TRAVEL: Light travels in transverse waves. This means that light waves move up and down, instead of in compressions like a sound wave moves. Light can travel extremely fast, much faster than sound! It can also travel through a vacuum, unlike sound. Sound needs a solid, liquid, or gas (matter) to vibrate, but light can travel anywhere! It only takes a light ray 8 1/2 minutes to travel 93 million miles from the Sun to Earth!