phil and lisa are watching their friends play basketball. They see the ball hit the back board before they hear the ball hit the back board. How would they describe their observation?"

Light travels faster than sound

Explanation:

Light does not need a medium to travel. The speed of light in vacuum is 300 million meters per second (i. e. 300,000,000 m/s) while the speed of sound in air is just 340 m/s. Sound is a mechanical disturbance through air or any other medium. No information can propagate faster than light.