Question

What is the critical angle for an air-glass interface? Given that the refractive index of air is 1 and the refractive index of glass is 3/2. [Use the sin-1 function of calculators to find the angle from ]

Answer 1

Explanation:

Given

the refractive index of air n(a)=1

and the refractive index of glass n (g)=3/2

critical angle=?

sinC = n(a)/n (g)

sinC=1/3/2

sinC =2/3

sinC=0.67

sinC=sin42

C=42

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