The refractive index of a medium is 1.5. Calculate speed of light in
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The refractive index of glass is given as 1.5 and speed of light in air is given as 3×108ms−1.
Hence we can use the equation 1 to determine the speed of light in the glass.
η=Speed of light in (vacuum/air)Speed of light in medium1.5=3×108Speed of light in mediumSpeed of light in medium
=3×1081.5=2×108ms−1
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