A source of sound producing sound of frequency f is at rest. An observer starts moving toward it at t=0 with a constant small acceleration. Which of the following graph best represents the variation of observed frequency f′ recorded by the observer with time t?

A source of sound producing sound of frequency f is at rest. An observ

1.	A source of sound producing sound of frequency f is at rest. An observer starts moving toward it at t=0 with a constant small acceleration. Which of the following graph best represents the variation of observed frequency f′ recorded by the observer with time t?
Answer» A source of sound producing sound of frequency $f$ is at rest. An observer starts moving toward it at $t = 0$ with a constant small acceleration. Which of the following graph best represents the variation of observed frequency $f^{'}$ recorded by the observer with time $t$ ?

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A source of sound producing sound of frequency f is at rest. An observer starts moving toward it at t=0 with a constant small acceleration. Which of the following graph best represents the variation of observed frequency f′ recorded by the observer with time t?

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