ANGLE OF MINIMUM DEVIATION, PRISM

If the angle of incidence is equal to the angle of emergence, the ray passes

• • Symmetrically through the prism

• • Perpendicular to the base

• • Along the base

• • Parallel to the base

In the position of minimum deviation, the angle of incidence i is related to the prism angle A as

• • i=A/2

• • i=(A+D_m)/2

• • i=A+D_m

• • i=D_m−A

If a prism of angle 60^∘ produces a minimum deviation of 40^∘, the refractive index of the material is approximately

• • 1.33

• • 1.50

• • 1.62

• • 1.80

The critical angle for a material is 45^∘. If the prism is made of this material, it will exhibit total internal reflection if

• • A>90^∘

• • A=90^∘

• • A<90^∘

• • None of the above

For a prism in the minimum deviation condition, the emergent ray

• • Is parallel to the incident ray

• • Is perpendicular to the incident ray

• • Has maximum deviation

• Symmetrically deviates with respect to the incident ray