By using the following equation, we can deduce the apparent frequency in the Doppler effect. NCERT Solutions CBSE CBSE Study Material Textbook Solutions What is the Doppler Effect The Doppler effect is also called the Doppler shift. The Doppler effect is an alteration in the observed frequency of a sound due to motion of either the source or the observer. The fraction is greater than one, so this formula agrees with our observation that the frequency of the wave measured by the receiver is greater than the frequency sent by the source. Click Here for Sample Questions Due to the relative motion between the source of the sound and the observer, the doppler effect implies the apparent change in the frequency of waves. So both source and receiver agree upon measurements of all three of the quantities in the equation v f.
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