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Physics-

General

Easy

Question

Sound from two coherent sources S₁ and S₂ are sent in phase and detected at point P equidistant from both the sources. Speed of sound in normal air is V₀ , but in some part in path S₁ , there is a zone of hot air having temperature 4 times, the normal temperature, and width d. What should be minimum frequency of sound, so that minima can be found at P?

$\frac{V_{0}}{d}$
$\frac{4 V_{0}}{d}$
$\frac{V_{0}}{2 d}$
$\frac{2 V_{0}}{d}$

The correct answer is: $fraction numerator V subscript 0 end subscript over denominator d end fraction$

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