A submarine is $200 m$ deep. What time the wave will take to detect it?

0.25 s

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0.12 s

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0.35 s

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1.2 s

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Solution

The correct option is A 0.25 s
$t = \frac{2 x}{v} = \frac{2 x}{f r e q u e n c y \times λ} = \frac{2 \times 200}{1.48 \times 10^{- 2} \times 10^{5}} = 0.25 s$

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A submarine is 200 m deep. What time the wave will take to detect it?

The correct option is A 0.25 st=2xv=2xfrequency×λ=2×2001.48×10−2×105=0.25 s

A submarine is $200 m$ deep. What time the wave will take to detect it?

The correct option is A 0.25 s
$t = \frac{2 x}{v} = \frac{2 x}{f r e q u e n c y \times λ} = \frac{2 \times 200}{1.48 \times 10^{- 2} \times 10^{5}} = 0.25 s$