A train sounds its horn as it slows down when approaching a crossing The frequency of the sound hear...........

General Science (Easy) Physics

A train sounds its horn as it slows down when approaching a crossing. The frequency of the sound heard by an observer standing at the crossing :

increases

decreases

remains the same

All are wrong

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Explanation:

Increases

-As the frequency increases, the wavelength decreases. So, as the speed of sound is constant at constant temperature and pressure, the frequency and wavelength are inversely proportional. The amplitude of the wave is independent of the frequency.

By: Abhipedia

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Zubin singh

Can you please explain how the frequency would decrease? As both sound and source of sound are moving in the same direction, frequency should increase.