An ambulance passes you in a stationary car. Because of the Dopplereffect A)the

Question

An ambulance passes you in a stationary car. Because of the Dopplereffect

A)the pitch of the siren is loweras the ambulance approaches and higher as is recedes fromyou.
B)the pitch of the siren is higher as theambulance approaches and lower as is recedes from you.
C)the pitch of the siren is higher as theambulance approaches and recedes from you than it would be as theambulance was stationary.
D)the pitch of the siren is lower as theambulance approaches and recedes from you than it would be as theambulance was stationary.
E)the change in pitch is due to a change infrequency and has nothing to do with the Dopplereffect.

Explanation / Answer

No problem. B - From a conceptual standpoint, as the ambulance movestoward you, it is moving into the sound waves that it is producingcreating a smaller wavelength and higher frequency (since speedstays the same). As it moves away, the wavefronts spread outsince it is moving away from the sound it just produced. Ican give you the mathematics as well is you need it Hope that helps

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