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Results tagged with speed
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user 251606
Scalar quantity which is the magnitude of velocity.
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votes
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answers
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Do photons actually slow down in a medium, or is the speed decrease just apparent? [duplicate]
Some places I've read flat out say light actually slows down in a medium, some say the speed decresae is just apparent but not real and that the photons still travel at the constant speed of light. …
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