NEET  >  Video: Doppler's Effect

# Video: Doppler's Effect Video Lecture - Physics Class 11 - NEET

## Physics Class 11

116 videos|451 docs|188 tests

## FAQs on Video: Doppler's Effect Video Lecture - Physics Class 11 - NEET

 1. What is Doppler's effect?
Ans. Doppler's effect refers to the change in frequency or wavelength of a wave for an observer moving relative to the source of the wave. It is commonly observed in sound waves, where the pitch of a sound appears to change as a moving object approaches or recedes from the observer.
 2. How does Doppler's effect occur in sound waves?
Ans. Doppler's effect occurs in sound waves due to the compression and expansion of waves as a source moves towards or away from an observer. When a source moves towards the observer, the waves get compressed, leading to a higher frequency and a higher pitch. Conversely, when a source moves away, the waves get stretched, resulting in a lower frequency and a lower pitch.
 3. Can Doppler's effect be observed in light waves?
Ans. Yes, Doppler's effect can be observed in light waves as well. In the case of light, the frequency shift can be seen as a change in color. When a light source moves towards an observer, the waves get compressed, causing a blue shift, leading to a higher frequency and a bluer color. On the other hand, when a light source moves away, the waves get stretched, resulting in a red shift, leading to a lower frequency and a redder color.
 4. How is Doppler's effect used in practical applications?
Ans. Doppler's effect has several practical applications. It is used in weather radar systems to determine the velocity and direction of moving precipitation, such as rain or snow. It is also used in medical imaging, such as ultrasound, to measure blood flow velocity or detect abnormalities in organs. Additionally, it is used in astronomy to determine the motion and velocity of celestial objects.
 5. Can Doppler's effect be applied to other types of waves?
Ans. Yes, Doppler's effect can be applied to other types of waves besides sound and light. It can be observed in water waves, electromagnetic waves, and even in seismic waves. The underlying principle remains the same, where the frequency or wavelength of a wave is affected by the relative motion between the source and the observer.

## Physics Class 11

116 videos|451 docs|188 tests

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