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1. Speed of light in air is \(3 \times {10^8}\ ms^{–1}\) and the refractive index of a medium is \(1.5\). Find the speed of light in the medium.
From the data given,
Speed of light in air (\(c\)) \(=\) \(3 \times {10^8}\ ms^{–1}\)
Refractive index of a medium (\(\mu\)) \(=\) \(1.5\)
The formula to calculate the refractive index of a medium is,
Substitute the known values,
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