Waves

How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way—in waves!
Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel through different kinds of matter.
Light waves travel 300,000 kilometers (186,000 miles) per second! They can also travel through a vacuum. That is why light from the sun and distant stars can travel through space to the earth!