Hi every1. I wanted to know why sound waves cannot travel in vacuum and why electromagnetic waves can travel in vacuum.
For my part, I reasoned that sound waves cannot travel in vacuum because vacuum does not contain air particles. since we hear sound due to layers of air being shifted till it reaches our ears, I thought that sound waves maybe can travel in a vacuum but we will not hear the sound. That is sound waves travel like electromagnetic waves. The latter do not shift layers of air to cause sound. Hence they can travel. So I think that sound waves actually travel in vacuum but without making any sound.
Please tell me whether I am right or wrong and answer the questions I asked before. Also tell me whether EM waves do cause vibration of particles, and if yes, in vacuum what vibrations do they cause.
Good luck for the answer and I hope I get a good one :)
2006-09-28
08:35:42
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5 answers
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asked by
Y L
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Science & Mathematics
➔ Physics