For a ray of light travelling from water (refractive index 1.33) into air (refractive…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

For a ray of light travelling from water (refractive index 1.33) into air (refractive index 1.00), which one of the following expressions correctly defines the critical angle ici_c at the water–air boundary? (a) sin⁡ic=1.331.00\sin i_c = \dfrac{1.33}{1.00} (b) sin⁡ic=1.33−1.001.33\sin i_c = \dfrac{1.33-1.00}{1.33} (c) sin⁡ic=1.001.33\sin i_c = \dfrac{1.00}{1.33} (d) sin⁡ic=1.001.33+1.00\sin i_c = \dfrac{1.00}{1.33+1.00}

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