What is the speed of light in a medium of refractive index 6/5 if its speed in air is 300 000 km/s?
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Refractive index=6/5
Speed of light in air=300,000 Km/s
Refractive index=Speed of light in air/Speed of light in a medium
1.2=300000/speed of light in a medium
Speed of light in a medium=300000×1.2
Speed of light in a medium=250,000Km/s
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