Question

can the speed of a sound wave is slower or faster than a electromagnetic wave?

Answer 1

sound waves rely on air particles physically touching each other and thus are quite slow; electromagnetic waves travel at the speed of light. Think of lightning - you see the flash (an electromagnetic wave travelling at the speed of light) well before you hear the thunder (a sound wave travelling through air)

Answer 2

Also, your question makes more sense like this: "Is the speed of a sound wave slower or faster than an electromagnetic wave?"

Just a thought :)

Answer 3

http://www.pa.msu.edu/sciencet/ask_st/072893.html