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This question already has an answer here:

Does speed of light depends upon the velocity of source in a medium (like water) other than space? if yes, does the speed gets added up when the light source moves in direction of light?

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marked as duplicate by John Rennie special-relativity Apr 23 at 14:54

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No, the velocity of the source does not affect the speed of light in any medium. The velocity of the medium, except when the medium is a vacuum, does affect the velocity of light in the medium.

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  • $\begingroup$ If the source is moving, the medium is relatively moving... So shouldn't the source velocity affect its speed $\endgroup$ – Iron man Apr 23 at 14:16
  • $\begingroup$ If the speed of light of a given frequency is measured inside the medium, it is dependent on the properties of the medium and nothing else. $\endgroup$ – S. McGrew Apr 23 at 14:46

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