The refractive index of glass is 1.5 . Calculate the speed of light in glass. The speed of light in air is $3.0 \times 10^8 ms^{-1}$.
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Given, Refractive index of glass = 1.5 Speed of light in air = $3.0 \times 10^8 $m/ s$\text{Refractive index of glass}=\frac{\text{Speed of light in air}}{\text{Speed of light in glass}}$
$1.5=\frac{3\times10^8}{\text{Speed of light in glass}}$
$\text{Speed of light in glass}=2\times10^8\text{m/ s}$
$1.5=\frac{3\times10^8}{\text{Speed of light in glass}}$
$\text{Speed of light in glass}=2\times10^8\text{m/ s}$
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