Complete the following sentence.Sound cannot travel through ……………, but it requires a …………. .A. Air, mediumB. Water, mediumC. Solids, mediumD. Vacuum, medium
Sound is a mechanical wave that requires a medium to travel. It propagates by vibrating the particles in the medium, whether that medium is a solid, liquid, or gas.
• Vacuum: In a vacuum, there are no particles to vibrate, so sound cannot travel. This is why sound cannot travel through a vacuum.
• Medium: Sound needs a medium, such as air, water, or solids, for its propagation.
Conclusion:
The correct answer is D. Vacuum, medium.
So, the complete sentence is:
Sound cannot travel through vacuum, but it requires a medium.
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