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Hello, I need a complete answer Please.

Hello, I need a complete answer Please.

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Concept: Since, wavefronts move with the same speed as the speed of wave (I mean speed of sound). So, whatever be the location of observer, speed of wavefronts would be same But frequency changes, Concept: Since, consecutive distance between two wavefronts is equal to one wavelength If speed is constant, then, Frequency of wave is inversely proportionalto wavelength Thus, if wavelength decreases frequency increase and if wavelength increases, frequency decreases. We can see in the figure, consecutive distancebetween wavefronts at C is smallest to the pointB and A. So, wavelength at C will be smaller to B and A. Thus, frequency at C will be highest to B andC. Correct option-(5) ion-(5)

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