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Question
A source of frequency of 500 Hz emits waves of wavelength 0.4 m. How long does it take the waves to travel 600 m?
Options
3 s
6 s
9 s
12 s
MCQ
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Solution
3 s
Explanation:
Given: \[ f=500\ \text{Hz}\]
\[\lambda=0.4\ \text{m} \]
Speed of the wave:
\[ v=f\lambda \]
\[= 500\times0.4\]
\[= 200\ \text{m s}^{-1} \]
Time taken to travel \(600\) m:
\[ t=\frac{d}{v} \]
\[= \frac{600}{200}\]
= 3 s
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