Question

In outer space you could see a distant explosion (separated by space), however you would not hear the explosion. Explain why this happens based upon your knowledge of wave propagation.

Answer 1

Think about the wave propagation of sound. How does it work? What does it need to work?

The space between the explosion and you is a vacuum, meaning it is completely empty. Why, therefore, will sound not be able to travel through it?

Hint: think about wave propagation and compression.