Glass has a grater index of refraction than air. The glass's and air's indexes of refraction will be 1.5 and 1, respectively.
The refractive index of a substance is a dimensionless quantity that specifies how quickly light passes through it in optics.
The index of refraction of the glass and air will be 1.5 and 1 respectively.
Hence,glass has a grater index of refraction than air.
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