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  1. The speed of light in air is
    1. 3 × l08 m/s
    2. 3 × l 0–8 cm/s
    3. 8 × l03 m/s
    4. Infinity
Correct Option: A

Speed of light (in Media) = Speed of Light (in Vacuum) / Refreactive Index of Material. Speed of light in air as taken generally is 3 X 10 power 8 meter per second.


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