Wave Motion 2 Question 38
38. Sound waves of frequency fall normally on a perfectly reflecting wall. The shortest distance from the wall at which the air particles have maximum amplitude of vibration is ….. m. Speed of sound .
(1984, 2M)
Integer Answer Type Questions
Show Answer
Answer:
Correct Answer: 38. 0.125
Solution:
- Wall will be a node (displacement). Therefore, shortest distance from the wall at which air particles have maximum amplitude of vibration (displacement antinode) should be
. Here,