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CBSE XII
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Physics
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Ray optics and optical instruments
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Q)
A source exits sound of frequency 600 Hz inside water. The frequency heard in air (velocity of sound in water 1500 m/s velocity of sand in air 300 m/s) will be
$\begin{array}{1 1} 300 \;Hz \\ 120 \;Hz \\ 600 \;Hz \\ 6000\;Hz \end{array} $
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