what is the doplers effect
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Answer:
an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other.
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Explanation:
Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It was discovered by Christian Johann Doppler who described it as the process of increase or decrease of starlight that depends on the relative movement of the star.
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