If at a concert you run toward the orchestra, the frequency of the sound you hear will be

Question

BlackTom AI · Accepted Answer

Question restatement: If at a concert you run toward the orchestra, the frequency of the sound you hear will be

Options:
- increased.
- decreased.
- neither decreased nor increased.

Option 1: increased. This aligns with the Doppler effect for a moving observer approaching the source. When you move toward the source, the waves compress in your frame, leading to a higher observed frequency. In more precise terms, the observed frequency increases as your relative speed toward the source reduces the distance between successive wavefronts reaching your ears.

Option 2: decreased. This would be true if you were moving away from the source, which would stretch the wavefronts and lower the frequency. Since the scenario specifies moving toward the orchestra, this decreasing effect does not apply here.

Option 3: neither decreased nor increased. If there were no relative motion between you and the source, or if the speed of sound were infinite, the frequency would appear unchanged. However, you are moving toward the source, so there is a clear change in frequency due to the Doppler effect, making this option inconsistent with the given situation.

Summary of reasoning: The Doppler effect explains how relative motion between observer and source alters perceived frequency. Moving toward the source shortens the interval between wavefronts arriving at your ears, resulting in an increased frequency. Moving away would produce a decreased frequency, while no relative motion would yield no change. The provided scenario specifically involves approaching the source, so the observed frequency increases, ruling out the other two options.

Win25_PHYS010_10428 Quiz 6 (Ch11-12)

If at a concert you run toward the orchestra, the frequency of the sound you hear will be

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Win25_PHYS010_10428 Quiz 6 (Ch11-12)

If at a concert you run toward the orchestra, the frequency of the sound you hear will be

查看解析

登录即可查看完整答案

类似问题

You stand by the railroad tracks as a train passes by. You hear a 950-Hz frequency when the train approaches, which changes to 820 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s.

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As a person walks towards the speaker, the frequency he or she hears

How will your perceived frequency change if the source is moving towards you?

In which of the following situations is the Doppler effect absent?

You are standing on the side of the road and a car with a loud siren goes past you. As it moves away you can expect the sound to become _______ and the wavelength to become_________.

The Doppler effect occurs when the source of a wave is moving. This causes the _____ of the wave to change.

If we observe one edge of a star to be redshifted and the opposite edge to be blueshifted, what can we conclude about the star?

更多留学生实用工具

希望你的学习变得更简单

You are standing on the side of the road and a car with a loud siren goes past you. As it moves away you can expect the sound to become _ and the wavelength to become___.