Question

Which of the following statements correctly identifies light and sound waves as they travel into a vacuum (empty space)?

Only sound can travel through empty space because it is electromagnetic.

Only light can travel through empty space because it is electromagnetic.

Both light and sound can travel through empty space because they are both
mechanical.

Both light and sound can travel through empty space because they are both electromagnetic.

Answer 1

Only light can travel through empty space, as sound is a vibration that uses a medium such as air to travel through. Electromagnetic waves do not need a medium.