For an equilateral prism,it is observed that | vedclass

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(C) For an equilateral prism,the angle of the prism is $A = 60^{\circ}$.When a ray strikes grazingly at one face,the angle of incidence $i_1 = 90^{\ci

Vedclass · Accepted Answer

$2$

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(C) For an equilateral prism,the angle of the prism is $A = 60^{\circ}$.When a ray strikes grazingly at one face,the angle of incidence $i_1 = 90^{\circ}$.When it emerges grazingly at the other face,the angle of emergence $i_2 = 90^{\circ}$.According to the prism formula,$r_1 + r_2 = A$. Since the ray is symmetric,$r_1 = r_2 = \frac{A}{2} = \frac{60^{\circ}}{2} = 30^{\circ}$.Using Snell's Law at the first face: $\mu = \frac{\sin i_1}{\sin r_1}$.Substituting the values: $\mu = \frac{\sin 90^{\circ}}{\sin 30^{\circ}} = \frac{1}{0.5} = 2$.

For an equilateral prism,it is observed that when a ray strikes grazingly at one face,it emerges grazingly at the other. Its refractive index will be

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