We cannot hear the echo produced in a classroom.
Answers
Answered by
3
Answer:
Because the fibre around us absorbs the sound and donot produce echo. In order to be able to hear a distant echo, the distance between two reflecting surfaces should be 17.2 m. The distance between two walls of a classroom is less than 17.2 m. ... Hence echo can't be heard in a classroom.
Answered by
12
1) FOR DISTINCT ECHOES, THE MINIMUM DISTANCE OF THE REFLECTING SURFACE FROM THE SOURCE OF SOUND MUST BE 17.2 m.
2) BENCHES IN THE CLASSROOM ARE SOUND ABSORBING MATERIALS WHICH PREVENT ECHO OF SOUND.
3) BECAUSE OF THESE TWO REASONS ECHO IS NOT HEARD IN CLASSROOM.
Similar questions