A) Sound travels in straight line
B) Sound travels as waves
C) Sound is a form of energy
D) Sound travels faster in vacuum than in air
Correct Answer: D
Solution :
Key Idea: Sound waves require a medium to travel. Sound is a compression waveform that moves through air or other materials. Sound has die. standard characteristics of any waveform but it requires a medium to travel, hence sound does not travel in vacuum.
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