Answers

2016-03-16T19:47:16+05:30
Sound wave is a mechanical wave and it requires a medium to propagate. In space there is vacuum which means no medium . So, the astronauts are not able to talk to each other because there is no medium for the sound waves to travel.
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2016-03-16T20:11:27+05:30
Sound wave is a mechanical wave and it requires a medium to propagate. In space there is vacuum which means no medium . So, the astronauts are not able to talk to each other because there is no medium for the sound waves to travel.
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