What is the refractive index of a solution that has a critical angle of 40.8° with respect to air? the refracting index of air is 1.00.

The formula for the critical angle is:

sin (critical angle) = refractive index of solution / refractive index of air

=> refractive index of solution / refrative index of air = sin (48°)

=> refractive index of solution / refractive index of air = 0.7431

=> refractive index of solution = 0.7431 * refractive index of air

=> refractive index of solution = 0.7431 * 1.00

=> refractive index of solution = 0.74

Answser: 0.74

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