The critical angle for total internal reflection at a liquid-air interface is 42.5◦. at. If a ray of light traveling in the liquid has an angle of incidence at the interface of 35◦, what angle does the ray refracted in air make with the normal? b. If a ray of light traveling through air has an angle of incidence at the interfaces of 35◦, what angle does the ray refracted in the liquid make with the normal?

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