GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A fire truck with it’s siren blaring at 7, 000 Hz has passed by a stationary observer, Which frequency would the observer hear?
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6, 000 Hz
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7, 000 Hz
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8, 000 Hz
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0 Hz
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Explanation:
Detailed explanation-1: -So while the siren produces waves of constant frequency, as it approaches us the observed frequency increases and our ear hears a higher pitch. After it has passed us and is moving away, the observed frequency and pitch drop.
Detailed explanation-2: -The frequency of the siren of an ambulance is 900 Hz and is approaching you.
There is 1 question to complete.