Sound waves cannot travel through a
- copper wire placed in air
- silver slab placed in air
- glass prism placed in water
- wooden hollow pipe placed in vacuum
Sound cannot travel through a vacuum. A vacuum is an area where there are no liquids, gases, or solids of any kind. There is absolutely nothing in a vacuum. If there are no substances, then there are no particles for the sound waves to vibrate, which means the sound waves cannot travel.
The correct option is D.