If speed of sound in air is 340 ~m / s and in water is 1480 ~m / s . If frequency of sound is 1000 kHz, then find wavelength in water

Correct answer: (B) 2.96 mm. Given that, v_w=1480 ~m / s, f=1000 kHz Speed, v_w=f λ ∴ λ=fracv_wf=1480/(1000 × 10^3)=1.480 ~mm

Q102 / 180 · JIPMER 2018 · Physics

If speed of sound in air is $340 \mathrm{~m} / \mathrm{s}$ and in water is $1480 \mathrm{~m} / \mathrm{s}$. If frequency of sound is 1000 kHz, then find wavelength in water

A
$2.96 mm$
Correct answer
B
$2.96 mm$
C
$1.48 mm$
D
$0.74 mm$

Solution

Given that, $\mathrm{v}_{\mathrm{w}}=1480 \mathrm{~m} / \mathrm{s}, \mathrm{f}=1000 \mathrm{kHz}$ Speed, $\mathrm{v}_{\mathrm{w}}=\mathrm{f} \lambda$ $\therefore \quad \lambda=\frac{\mathrm{v}_{\mathrm{w}}}{\mathrm{f}}=\frac{1480}{1000 \times 10^3}=1.480 \mathrm{~mm}$

Hence, the correct answer is option: 'B'.

If speed of sound in air is $340 \mathrm{~m} / \mathrm{s}$ and in water is $1480 \mathrm{~m} / \mathrm{s}$. If frequency of sound is 1000 kHz, then find wavelength in water

Solution

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