An example of the Doppler Effect in action would be when…
A change in the mass of the sound wave.
The energy transfer from sound to heat energy
When someone dopplers the ball in baseball
The high pitch sound of a motorcycle approaching, followed by deepening of the sound after it passes
The correct answer and explanation is :
The correct answer is: The high pitch sound of a motorcycle approaching, followed by deepening of the sound after it passes.
Explanation:
The Doppler Effect refers to the change in frequency (and thus pitch) of a wave in relation to an observer who is moving relative to the wave source. This effect is commonly heard in sound waves but can also be observed in any type of wave. The change in pitch occurs because the wave source and the observer are in motion relative to one another.
When the source of the sound (such as a motorcycle) is moving toward an observer, the sound waves are compressed. This compression leads to a higher frequency (or pitch). As the motorcycle approaches, the observer hears the sound at a higher pitch because the waves are arriving more frequently.
Once the motorcycle passes the observer and moves away, the sound waves are stretched out. This stretching of the waves leads to a decrease in frequency, which corresponds to a lower pitch. As a result, the sound deepens as the motorcycle moves away.
The Doppler Effect is not limited to sound waves; it can also apply to light waves and other types of waves, but the sound example of the motorcycle is a classic and easily observable example.
Key Points:
- Approaching Object: The waves are compressed, resulting in a higher pitch.
- Receding Object: The waves are stretched, leading to a lower pitch.
- This effect is noticeable when there is relative motion between the wave source and the observer.
The Doppler Effect explains many real-world phenomena, such as the change in pitch of an ambulance siren as it passes by or the change in the color of light emitted by stars moving toward or away from us (redshift and blueshift).
Here is an illustration of the Doppler Effect, showing the sound waves of a motorcycle as it approaches and then passes an observer. The diagram demonstrates how the waves are compressed in front of the motorcycle, leading to a higher pitch, and stretched behind it, leading to a lower pitch. This visual should help clarify the concept.