Question

How does the Doppler effect explain why a siren's pitch increases as it approaches you?
A. The siren moves away from sound waves it has already produced, increasing their wavelength.
B. The siren moves closer to sound waves it has already produced) decreasing their wavelength
C. The siren moves away from sound waves it has already produced decreasing their wavelength,
D. The siren moves closer to sound waves it has already produced, increasing their wavelength​

Answer 1

Answer:a

Explanation:I just took the quiz and got it right lol

Answer 2

The Doppler effect explains why a siren's pitch increases as it approaches you as it infers that the siren moves away from sound waves it has already produced, increasing its wavelength. This is further explained below.

What is Doppler effect?

Generally, The Doppler effect is simply the apparent variation between the frequency via which waves leave an origin and how they reach an observer.

In conclusion,  increasing its wavelength is the wave property that causes the effect.

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