Q. A long Rail (approximately 700 meters) made up of steel is struck to produce a sound. The person standing on the other end of the rail would hear in which among the following pattern? (Solved)
1. He listens the sound waves once propagated via steel
2. He listens the sound waves once propagated via air
3. He listens the sound waves twice, first propagated via steel and second propagated via air
4. He listens the sound waves twice, first propagated via air and second propagated via steel
- c. He listens the sound waves twice, first propagated via steel and second propagated via air