Question - State Snell's law of refraction of light. Write an expression to relate refractive index of a medium with speed to light in vacuum.
The refractive index of a medium 'a' with respect to medium 'b' is 2/3 and the refractive index of medium 'b' with respect to medium 'c' is 4/3. Find the refractive index of medium 'c' with respect to medium 'a'.
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