Physicsmedium · Past Paper
In which medium does light travel the fastest?
AWater (n=1.33)
BGlass (n=1.5)
CKerosene (n=1.44)
DAir (n=1.0003)
✓ Correct Answer: D — Air (n=1.0003)
The speed of light is inversely proportional to the refractive index; thus, it is fastest in the medium with the lowest index.
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