• # question_answer 35) For Doppler's effect, which of the following is a correct statement (I) During observer motion both frequency and wavelength will change (II) During source motion both frequency and wavelength will change (III) During source motion only frequency will change (IV) During observer motion only frequency will change A)   I, II                            B)  I, IIC)  II, III                           D)  II, IV

(Source) motion$\lambda$, n both change, (Observer) motion only n change.