OpenStudy (anonymous):
How does light travel? Answer Light only travels in a vacuum and travels faster when the sound source is moving. Light only travels in a medium and light travels faster when a sound source is stationary. Light can travel in a vacuum and the speed varies depending on whether the source is moving or stationary. Light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
OpenStudy (agreene):
"Light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving."
OpenStudy (anonymous):
Light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving
OpenStudy (anonymous):
Both answers above are true as far as I understand. I think this is one of the things shown by Einstein's theory of special relativity.
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