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anonymous

  • one year ago

Why does light travel faster in a vacuum?

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  1. sohailiftikhar
    • one year ago
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    because their pressure is low.

  2. Abhisar
    • one year ago
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    Because, vacuum is optically least dense. understand it like this, your speed of propagation will be less in a path full of traffic (optically dense) and will be high when traffic is low (optically rarer).

  3. Michele_Laino
    • one year ago
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    in a medium with refractive index n>1, the light speed is: \[\Large v = \frac{c}{n}\] and c is the light speed in vacuum. Now being n>1, we see that: \[\Large v = \frac{c}{n} < c\]

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