Chapter 33, Problem 33.46P

(a)

To determine

The critical angle ${\theta }_{\text{crit}}$ for the light traveling in the core and reflecting at the interface with the cladding material.

(b)

To determine

The expression is $\sin {\theta }_{\text{i}}=\sqrt{n_1{}^2-n_2{}^2}$.

(c)

To determine

The value of ${\theta }_{\text{i}}$ for $n_1=1.465$ and $n_2=1.450$.