Answers

  • Brainly User
2014-11-01T18:59:15+05:30
Dopplers effect is the change that seems to happen in the rate of sound or light wave production of an object when it's movement changes in relation to other object.
0
2014-11-01T20:45:57+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Doppler's effect is the apparent change in frequency in waves due to relative motion between observer and source of waves.  A scientist called Doppler found it in 19th century.

Doppler shift in sound waves is observable easily when a train or zeep with a siren  sounds and moves away. Or, even when there is a fast wind blowing.

apparent frequency = ν' = ν₀ [ ν + v_observer ] / [ v - v_source ]
 
           where v₀ = original frequency,
             v = velocity of sound in still air + velocity of wind, if blowing
                       v_observer = velocity of observer
                       v_source = velocity of the source of sound
         
Doppler effect is also observed in light waves. 

0