Three musicians experiment with the Doppler affect . Musician A rides in a car at a speed u directly away from musician B who is stationary . Musician C redes in a car directly toward B and travels at the same speed as A. Musician A plays a note at frequency `f_(A)` on his trumpet . B hears the note , adjusts his trumpet , and plays the same note he heard.

Options

A. The note heard by C coming from B will be the same pitch as `f_A)`.
B. note heard by a coming from b will be higher in pitch than `f_(A)`.
C. The note heard by A coming from B will be in pitch than `f_(A)`.
D. The note heard by B coming from A will be lower in pitch than `f_(A)`.

Answer

A, C, D