Question:
An engine is moving on a circular path of radius $100\, m$ with a speed of $20 \,m / s$. What will be the frequency observed by an observer standing stationary at the centre of rircular path when the engine blows a whistle of frequency $500 \,Hz$ ?
An engine is moving on a circular path of radius $100\, m$ with a speed of $20 \,m / s$. What will be the frequency observed by an observer standing stationary at the centre of rircular path when the engine blows a whistle of frequency $500 \,Hz$ ?
Updated On: Jan 18, 2023
- More than 500 Hz
- Less than 500 Hz
- 500 Hz
- No sound is heard
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The Correct Option is C
Solution and Explanation
As motion of the source is always perpendicular to the direction of propagation of sound, so there will be Doppler's effect.
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Concepts Used:
Doppler Effect
The Doppler effect is a phenomenon caused by a moving wave source that causes an apparent upward shift in frequency for observers who are approaching the source and a visible downward change in frequency for observers who are retreating from the source. It's crucial to note that the impact isn't caused by a change in the source's frequency.
The Doppler effect may be seen in any wave type, including water waves, sound waves, and light waves. We are most familiar with the Doppler effect because of our encounters with sound waves