SEA nw DC10
Topic Author
Posts: 471
Joined: Fri Oct 22, 1999 3:03 am

Science Class Question...please Help!

Fri Mar 15, 2002 4:57 pm

I have a question on my take home mid term....Why don't we hear the plane at the same moment we see the plane. Why is the noise delayed?

Anybody? I think it's because the engines are faced the oposite way or somthin...?

SEAnwDC10
 
jhooper
Posts: 5560
Joined: Thu Dec 13, 2001 8:27 pm

RE: Science Class Question...please Help!

Fri Mar 15, 2002 4:59 pm

Simple. Sound travels much slower than light. So as you see the plane, the light waves have traveled so fast (about 186,000 miles per second), but it will still take the sound much longer to reach you (since the sound waves only travel about 700mph).

Hope this helps.
Last year 1,944 New Yorkers saw something and said something.
 
dnl65
Posts: 78
Joined: Fri Jun 22, 2001 5:52 am

RE: Science Class Question...please Help!

Fri Mar 15, 2002 10:42 pm

Ask yourself this question, which travels faster sound or light?