3 years ago

Match the correct term with the statement that is true about it

Physics

1 answer:

Sholpan [36]3 years ago

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Two speakers face each other, and they each emit a sound of wavelength λ. One speaker is 180∘ out of phase with respect to the o

mel-nik [20]

Answer:

a. 3/4λ

d. 1/4λ

Explanation:

When the wavelength of the sound waves is λ and the two waves are having same frequency the waves are said to be out of phase if their phase difference is in the multiples of $\frac{\lambda}{2}$ or 180°.

When the two waves are out of phase then their opposite maxima coincide at the same time resulting in the minimum amplitude of the resulting wave throughout.

As we observe from the schematic that the a wave has sinusoidal pattern of variation and we get a maxima after each $\frac{\lambda}{4}$ of the distance.

Here we have two speakers out of phase therefore on shifting one of the speakers by the odd multiples of $\frac{\lambda}{2}$ we have the maxima or the extreme amplitudes.

So, we must place the microphone at 3/4λ and 1/4λ to pickup the loudest sound.