The refractive index of glass with respect to air is 1.5. What is the speed of light in glass?
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Refractive index of glass is 1.5. Find the speed of light in glass, if its speed in air is 3 × 10^8 m s^-1 . Also find critical angle for glass.
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We know that refractive index of light is defined by η=speedoflightthatmediumspeedoflightinvaccum
η=v3×108=1.5
v=2×108m/s
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