Here's why:

* Light is an electromagnetic wave, meaning it doesn't require a medium to travel. It can travel through the vacuum of space. The speed of light in a vacuum is a constant, approximately 299,792,458 meters per second.

* Sound is a mechanical wave, meaning it requires a medium (like air, water, or solids) to travel. Sound waves are vibrations that travel through the medium by causing particles to bump into each other. In a vacuum, there are no particles to vibrate, so sound cannot travel.

Therefore, light can travel through a vacuum at its maximum speed, while sound cannot travel at all.