Verified Answer :

metchelle

From my research, the question has the following choices:

a.the lowest frequency at which a standing wave is possible

b. the highest frequency at which s standing wave is possiblec. the only frequency at which a standing wave is possible

d. the only frequency at which standing wave is not possible

From there, the correct answer is A.

Answer:

This is the minimum possible frequency generated by the given medium

Explanation:

Let say the medium through which sound is produced is a hollow pipe closed at one end

Now at minimum possible situation the wave that will form in it will be of quarter length so we can say

\(L = \frac{\lambda}{4}\)

so we have

\(\lambda = 4L\)

now we will have

\(f = \frac{v}{\lambda}\)

so fundamental frequency of closed pipe will be

\(f = \frac{v}{4L}\)

similarly if pipe is closed then in that case the wavelength will be half inside the pipe

\(L = \frac{\lambda}{2}\)

now we have

\(f = \frac{v}{2L}\)

in this way we can say it is the minimum frequency of sound produced by the source

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