A sound is produced in water and moves towards surface of water and...
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A sound is produced in water and moves towards surface of water and some sound moves in air
\( \mathrm{P} \) velocity of sound in water is \( 1450 \mathrm{~m} / \mathrm{s} \) and that in
W air is \( 330 \mathrm{~m} / \mathrm{s} \). When sound moves from water to air then the effect on frequency \( f \) and wave length \( \lambda \) will be:
(1) \( f \) and \( \lambda \) will remain same
(2) \( f \) will remain same but \( \lambda \) will increase
(3) \( f \) will remain same but \( \lambda \) will decrease
(4) \( f \) will increase and \( \lambda \) will decrease
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