Two speakers create identical
240 Hz sound waves. A person is
1.47 m from Speaker 1. What is the minimum distance to Speaker 2
for there to be destructive
interference at that spot?
(Hint: v= A f = 343 m/s)
(Unit = m)

2.185 m

Explanation:

We are given that

Frequency of identical sound wave=

Distance of speaker from person 1=

Velocity of sound wave,v=

We have to find the minimum distance to speaker 2 for there to be destructive interference at that spot.

We know that

We know that

For minimum distance

n=1

Substitute the value

Hence, the minimum distance to speaker 2 for to be destructive interference at that spot=2.185 m