Question

Why does a siren have a lower pitch as it moves away from you?
O
The troughs of the sound wave are spaced closer together,
O
The crests of the sound wave are farther apart.

O The period of the sound wave is decreased,

O
The amplitude of the sound wave is increased,

Answer 1

Answer: Is B/the second one

The crests of the sound wave are farther apart

Explanation: I took the test and wish all of you guys good luck! Have a wonderful day! <3

Answer 2

The lower pitch of the siren is because the crests of the sound wave are farther apart.

What is wavelength?

The term wavelength can in otherwords be described as the difference between two succcesive crests or troughs. Now we know that as the siren moves away from you its pitch decreases as the wavelength increases.

Hence, the lower pitch of the siren is because the crests of the sound wave are farther apart.

Learn more about wavelengths: https://brainly.com/question/9496279