Deviation of light due to prism

• 37

• 28

• 33

• 45

Which of the following is the physical significance of the angle 𝛼?

• The angle 𝛼 is the critical angle of the prism for total internal reflection.

• The angle 𝛼 is the angle through which the direction of the path of a light ray changes due to the ray passing through a prism.

• The angle 𝛼 is directly proportional to the ratio of the base of the prism to the height of the prism.

• The angle 𝛼 is the angle that a prism would have to rotate around its apex in order to produce total internal reflection of the incident ray shown.

A triangular prism with a refractive index of 1.6 has an apex angle of 30∘.A light ray falls on one of its faces at an angle 𝜙 emerges perpendicularly from the other face. Which of the following is the value of 𝜙?

• 53.13∘

• 
  60∘

• 67.48∘

• 36.87∘

What is the angle of emergence of a light ray which has an angle of incidence of 23∘ on a prism with an apex angle of 35∘ and a refractive index of 1.2?

• 30∘

• 19∘

• 7∘

• 16∘

• 80.7

• 48.6

• 63.2

• 39.12

• 16.77

• 30

• 60

• 55

A light ray fell on a prism at an angle of incidince 45 and emerged at angles 52 if the prism refractive index is 1.5 then the apex angle equals ........

• 42

• 52.34

• 38.2

• 59.8