Question

An observer is moving with a constant speed of 40 m/s on a circular track of radius 100 m, a source kept at the centre of track produce sound of frequency 250 hz, then frequency received by the observer is

Answer 1

Answer:

stays the same

Explanation:the observer is walking around a circle track and the sound is in the center so a circle has no corners so the sound is the same all around.

Answer 2

Answer:

The frequency received by the observer is 250 Hz only.

Explanation:

Here, the observer relative velocity is perpendicular to the source, there is no doppler effect.

As a result, the frequency with which the reaches the source will remain constant.

As a result, the recorded frequency is 250 Hz.

What is doppler effect ?

The Doppler effect is a phenomenon that occurs when sound travels when the source or detector moves relative to the transmitting medium, the Doppler effect occurs, which causes a change in the perceived frequency of a wave.

Concept of doppler effect

The observer or listener is the person who hears the noises, while the source is the item that makes the sounds. There are two scenarios that cause the Doppler effect, as stated in the introduction:

• When the source moves in relation to the observer who remains stationary.
• When the observer moves away from a fixed source.

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